Friday
May 24, 2013

# Search: write quadratic equation from formula

Number of results: 70,962

Algebra
How would I write a quadratic equation having the given numbers as solutions 4i, -4i
Sunday, April 25, 2010 at 9:12am by dani

Algebra I
What is the quadratic equation? In the standard form of the quadratic, ax2 + b x + c=0 a, b and c are constants. Then x is equal to (-b +- sqrt (b2 -4ac) )/2a huh?? You asked what the quadratic equation was, I gave it to you. You need to read your text on this if you are lost...
Saturday, July 14, 2007 at 7:40pm by April

ALGEBRA
What does it mean to give the solutions to the following quadratic equation by examining the graph of the related quadratic function: Graph: y = x^2 + 2x - 15 Equation: x^2 + 2x - 15 = 0
Wednesday, September 16, 2009 at 10:51pm by ggift

math/algebra
to do this you can either just factor it out (if it is factorable) or use quadratic formula. since it's factorable, (x + 4)(x - 3) = 0, thus x = -4 and x = 3 using quadratic formula: x = [-b +- sqrt(b^2 - 4ac)]/(2a) where a = numerical coefficient of x^2 b = numerical ...
Saturday, September 3, 2011 at 9:24pm by Jai

geometry
Rearrange equation into: 3x&sup2;-x + 6x-2 =x(3x-1) + 2(3x-1) =(x+2)(3x-1) or use the quadratic formula, or by completing squares.
Saturday, August 28, 2010 at 9:58pm by MathMate

Chopsticks
solve the equation for x using the quadratic formula: 3x^2 + 8x + 1 = 0 Work: I tried factoring it, but I can't do it. (3x + ?)(x + ?) I'm thinking the ? = 1 but that won't work.
Monday, August 31, 2009 at 10:55pm by math

chemistry
Aqueous solutions of iron (III) sulphate and barium hydroxide are combined. Does a precipitate form? If yes write a net ionic equation for the precipitation reaction. You first identify the formula of the aqueous compounds (note that iron is said to be iron(III)), and use it ...
Sunday, November 13, 2011 at 8:16am by luke

pre-cal
What are the steps for solving this? Directions Use the quadratic formula to solve the equation in the interval [0,2PI). Then use a graphing utility to approximate the angle x. 4cos^2x-4cosx-1=0 thanks.
Friday, January 1, 2010 at 2:54pm by james

I don't know what the steps are. Perhaps the first step is to identify the a, b, and c that fit into the quadratic formula. a = 1, the coefficient of the squared term. b = 5, the coefficient of the x term. c = -6, the number.
Tuesday, May 18, 2010 at 2:24pm by DrBob222

maths
for this quadratic equation: y2-4y-16 = 0 which two options are correct solutions, rounded to three decimal places? 1) -4.483 2) -3.243 3)-2.472 4) -1.472 5) -0.536 6) 5.243 7) 6.472 8) 12.443 Use the quadratic equation, we will be happy to critique your solution.
Sunday, April 15, 2007 at 8:11pm by angel

math
expand the two binomials, combine like terms, then put it in the form of a quadratic...you can then use the quadratic equation, or perhaps factor to find x.
Tuesday, March 10, 2009 at 2:00pm by bobpursley

Geometry
one-half of a number is 8 less than two-thirds of the number. write algebraic equation: the sum of x and 8 is 15 write algebraic equation: 4 more than x is 9 write algebraic equation: 5 less than twice x is equal to 35 write algebraic equation: the product of 10 and x is the ...
Tuesday, May 14, 2013 at 6:06pm by ji

math
one-half of a number is 8 less than two-thirds of the number. write algebraic equation: the sum of x and 8 is 15 write algebraic equation: 4 more than x is 9 write algebraic equation: 5 less than twice x is equal to 35 write algebraic equation: the product of 10 and x is the ...
Tuesday, May 14, 2013 at 5:50pm by ji

Algebra
Find two consecutive positive integers such that the sum of the square is 85..(show your work) If X is the first integer, then X+1 is the next; therefore, the sum of those squares will be 85. X^2 + (X+1)^2 = 85 Solve for X, then add 1 to it for the second integer. Post your ...
Wednesday, June 13, 2007 at 3:22pm by Tomika

chemistry
Magnesium oxide forms from magnesium metal and oxygen gas. Write a word equation and an unblanced formula equation. Include all of the appropriate notations.
Tuesday, February 3, 2009 at 11:40pm by kate

maths
how do i find out the the equation of the line of symmetry for f(x)=ax^2+bx+c ? please explain it do me thanks! The line of symmetry runs through the vertex. so the x of the vertex is -b/(2a) and the equation of the line of symmetry is x = -b/(2a) e.g. for f(x) = 2x^2 - 12x + ...
Friday, May 25, 2007 at 4:04am by Emma

chemistry
You have two choices. 1)The simple choice, and one which doesn't always work, is to assume x is very small in comparison with 0.001 so that 0.001 - x = 0.001. That way you don't have a quadratic equation. You can try that, then see if 0.001 - x = about 0.001 or not. If...
Sunday, April 6, 2008 at 10:42pm by DrBob222

algebra
1.Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in stadard form ax^2+bx+c=0 Solution 7, only solution 2.The width of a rectangle is less than the length. The area is 4ft^3. Find the length and the width.
Saturday, December 17, 2011 at 10:51pm by lisa

math
i think you mean 3k^2 + 6k = 6 thus, we can re write this as 3k^2 + 6k - 6 = 0 note that we can factor out 3 from each term and cancel it. thus we can re write this as k^2 + 2k - 2 = 0 using quadratic formula, k = [-b +- sqrt(b^2 - 4ac)]/(2a) substituting, k = [-2 +- sqrt(2^2...
Saturday, May 21, 2011 at 8:15am by Jai

Chemistry
Write a balanced chemical equation (molecular equation). Write a total ionic equation. write a net ionic equation. (NH4)2 SO4(aq)+Na2CO3(aq) --&gt;
Tuesday, March 15, 2011 at 9:52pm by Jake

algebra
i have very little information in my math book on the following questions. can you either tell me the answer or a link where i can find my own answer. thanks How do you know if a quadratic equation will have one, two, or no solutions? How do you find a quadratic equation if ...
Monday, November 15, 2010 at 7:07pm by Donni

ALGEBRA 2
Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x= PLEASE, help me with this one problem I am stuck on! THANKS!
Tuesday, April 16, 2013 at 6:06pm by student

ALGEBRA 2
Factor the given expression. Then use the zero product rule and the quadratic formula to solve the problem. There should be three solutions to the equation. x^3-2197 x= PLEASE, help me with this one problem I am stuck on! THANKS!
Tuesday, April 16, 2013 at 6:03pm by student

math
I need help finding x for this equation e^x (x^2 + 4x + 2)=0 thanks. e^x = 0 or x^2 + 4x + 2 = 0 the first has no real solution (actually x would have to an infinitely large negative number) The second is a quadratic, use the formula to solve it.
Wednesday, May 9, 2007 at 10:31pm by eric c.

math
x^2=3x-6 x^2-3x+6=0 In quadratic equation y=ax^2+bx+c discriminate is D=b^2-4ac In your case a=1 b= -3 c=6 D=b^2-4ac=(-3)^2-4*1*6=9-24= -15 When discriminante is negative quadratic have two imaginare solutions. If you want to know that solutions in google type: quadratic ...
Thursday, February 17, 2011 at 1:11am by Bosnian

Algebra
Can someone help me with this question. I thought it was quadratic but now I am not sure. State whether the equation represents a linear, quadratic, exponential function or none of the above. x^2+ 6 = -8 x
Thursday, January 14, 2010 at 1:44pm by Kate

Algebra
I do not know what your problem is. That is sort of the quadratic equation: x = [-b +/- sqrt(b^2-4ac)]/2a and you would get the two answers but I did not see the original quadratic so do not know if right or not (although I can do it backwards).
Wednesday, March 19, 2008 at 7:21pm by Damon

Pre calc
The standard form is ax^2 + bc + c = 0 The value of ax^2 + bx +c will be zero when x = [-b +/- sqrt (b^2-4ac)]/2a If you want to write a quadratic equation that is zero at given values x=d and x=e, first write it as (x-d)(x-e) = 0 and then multiply it out for the standard form...
Saturday, August 2, 2008 at 9:12am by drwls

Algebra
I have a parabola that I have to write as an equation I found the vertex as (-3,-2) and the following points (-4,-1)(-2,-1),(-5,2),(-1,2). I can't seem to come up with the correct equation. I'm using the formula y=a(h-k)^2+k but I'm not doing something right. Can ...
Sunday, May 15, 2011 at 10:21am by Jennifer

algebra
The guy wire, the telephone phone and the ground form a right-angled triangle. Your measurements are x, x+4, and 20. To solve for x, you could use the Pythagorean Theorem, a^2+b^2=c^2. Let a=x Let b=x+4 Let c=20 First, plug in the values for a, b and c, and then simplify. From...
Sunday, December 2, 2012 at 11:01pm by Shawn

algebra
The area of the wall you are going to paint is 50 feet2. If the width is half the height, what are the dimensions of the wall? In answering this problem follow the steps below: 1. Represent the height as ‘x’ and then write the width in terms of x (for example, 2x, 5....
Tuesday, January 3, 2012 at 11:32pm by Jennifer

Chemistry
write the balanced chemical equation for reaction the following chemical reaction ozone gas, O3 , reacts with 3,3,4,4,5,5-hexamethyl-1-hexyne, H-CßC-C(CH3)2-C(CH3)2-C(CH3)2-CH3 to produce carbon dioxide gas, CO2 , and water gas , H2O . When balancing the equation...
Monday, March 12, 2012 at 10:31am by Susan

algebra
2.1t^2 - 82t + 95 = 15 2.1t^2 - 82t + 80 = 0 solve using the quadratic equation formula, I got t = 1.00 or t =38.05
Sunday, December 5, 2010 at 8:03pm by Reiny

algebra
2x^2-2x-1=0 How do I use the quadratic formula to solve this because I am totally new at this and need help? Please show me the steps for this equation,so I will be able to do it own my own. Thank you.
Sunday, September 5, 2010 at 10:56pm by paulina

algebra
The quadratic formula is (-b +/- sqrt(b^2 - 4ac))/2a for an equation in the form ax^2 + bx + c -3x^2 - 2x - 5 = 0 a = -3 b = -2 c = -5 x = (2 +/- sqrt(4 - 60))/6 x = (2 +/- sqrt(-56))/6 x = (1 +/- i*sqrt(14))/3
Monday, July 20, 2009 at 7:49pm by Marth

math(trig)
i need to figure out how to write the formula for the following question In a right triangle a = 30 yds and t5an A = 2. Find b and c. I have the answers but do not know how to write the formula. Can you help me ?
Tuesday, December 18, 2007 at 10:22pm by freddie

algebra
can someone explain the benefits of writing a quadratic equation in vertex form and benefits of writing a quadratic equation in standard form? Name specific methods you can use while working with one form or the other. Any help will be appreciated.
Monday, November 5, 2012 at 10:01pm by Lee

Math
Your formula is correct. Assuming you add up the 3x and x to form 4x, you have to use the general solution of a quadratic equation. Do you know how to use it? =) By the way, x should be 8 if you use it right.
Tuesday, October 14, 2008 at 7:33pm by Joshua

trig 30
hey Rae, there is two ways you can do this... 1/ find the common factor of 2cos^2x+cosx=1 and bring out the front which = cosx(2cosx+1)=1 therefore either cosx=1 OR 2cosx+1=1 (because there will be multiple answers) for cosx=1 use the unit circle to show where cosx=1 which is ...
Thursday, April 29, 2010 at 10:01pm by Belle

Chem:DrBob
When you write the formula in word equation would it be : Octasilicon and oxygen reacted to produce sulfur trioxide? Would this be the balance equation? S8 + 12O2 -&gt; 8SO3
Monday, December 17, 2012 at 9:32pm by Shadow

Chemistry
0.717 g of a compound containing carbon, hydrogen, and oxygen is burned and found to produce 1.02 g CO2 and 0.624 g H2O. The molar mass of the compound is 124 g/mol. (a) Write a chemical equation for the combustion of this unknown hydrocarbon. (b) Determine the # of g and ...
Wednesday, August 24, 2011 at 10:57pm by Anonymous

Algebra II
Factor the first one by setting each term equal to 0. 2x - 3 = 0 2x = 3 x = 3/2 Do the same process for 3x - 5. For the second, look over the Quadratic Formula. It states that for an equation ax^2 + bx + c, x will equal the opposite of b plus or minus the square root of b ...
Wednesday, November 28, 2007 at 6:46pm by Michael

Math x-int's
How do I algebraically find the x-intercepts for this equation y = x^3 - 3x^2 + 3. I know I need to plug in y = 0 to solve for x. x^3 - 3x^2 + 3 = 0 But where do I go from there? I don't think I can factor, and I don't think I can use the quadratic formula.
Saturday, December 8, 2007 at 6:01pm by jeff

Mat/117 DQ2
Quadratic equations may be solved by graphing, using the quadratic formula, completing the square, and factoring. What are the pros and cons of each of these methods? Please provide examples. When might each method be most appropriate? Which method do you prefer? Explain why.
Monday, February 27, 2012 at 5:25pm by Rose

Math
Rewrite it in standard quadratic form as: 0.19t^2 - 2.56 t +6.60 = 0 The coefficients and constant are: a = 0.19 b = -2.56 c = 6.6 Then use the quadratic formula for the two roots: t = [-b +/1 sqrt(b^2-4ac)]/2a One of the solutions is exactly 10. The other is 3.4737
Sunday, August 22, 2010 at 1:00am by drwls

math
I need help with write the equation of the line which contains the point (0,negavtive 3), or written ars(0, -3) and whose slope is 4. if you want the equation in the form y = mx + b sub in -3 for y, 4 for m, and 0 for x for -3 = 4(0) + b so b = -3 equation: y = 4x -3 We could ...
Friday, April 27, 2007 at 6:52pm by Don

Math
for 2nd equation, we get x = 2y-3 thus plugging into first equation gets (2y-3)^2+9y^2 = 37. 4y^2-12y+9+9y^2 = 13y^2-12y+9=37 = 13y^2-12y-28 = 0. Solving with the quadratic formula gives us: 2,-14/13
Tuesday, December 11, 2012 at 11:07am by Knights

Math
When the leading coefficient a is positive, the parabola opens up ( concave up ) For function: x ^ 2 - 2 x - 8 the leading coefficient is a = 1 function is concave up When the parabola ia concawe up all walues between roots are negative. No negative number can have a real ...
Saturday, March 31, 2012 at 2:07pm by Bosnian

math help plz
i dont know how to solve it but i have the quadratic formula but i dont know is it the same when the 0= is in the begining and 0= is at the end. i can use that formula?because i get confused
Monday, May 25, 2009 at 12:19pm by puppy101

math - question
The number of solutions is not "at least" two. There is always two OR ONE solutions, but they may not be real numbers. The solutions may contain a term multiplied by the square root of a negative number, which is "imaginary". The reason for two solutions ...
Friday, February 27, 2009 at 12:29pm by drwls

math
x * y = 7 x - y = 5 One method: express one variable in terms of the other variable and then solve the single variable expression. If x - y = 5 then y = x - 5 substituting back into the first equation: x * (x - 5)=7 Solve for x, then substitue the x value into either equation ...
Thursday, October 2, 2008 at 5:50pm by Quidditch

1. Factor by completing the square or the quadratic formula. However, factoring by trial and error is faster, noting that only a few rational factors are possible, namely x&plusmn;1, x&plusmn;2, x&plusmn;3, x&plusmn;4, x&plusmn;6. 2. note that x is a common...
Wednesday, September 1, 2010 at 8:26am by MathMate

Math
Write a brief scenario that can modeled with a linear equation. AND Summarize a situation modeled by a quadratic equation. I am completly lost with these two questions. I understand the difference between these two functins but don't know how to come up with a scenario or ...
Thursday, April 8, 2010 at 5:39pm by Carrie

Geometry
Use Pythagoras x^2 + (x+1)^2 = 16 Expand to get a quadratic equation. Solve using the formula and use only the positive answer (I got a width of 2.28 and a length of 3.28)
Wednesday, October 17, 2007 at 11:16am by Reiny

pre calc
x^2+2x+5=0 This equation has two complex roots. If you have not done complex roots before, I suggest you check that the equation has been correctly posted. You can apply the quadratic formula directly, a=1, b=2, c=5, x=(-b&plusmn;&radic;(b&sup2;-4ac))/2a =(-2&...
Thursday, October 29, 2009 at 11:29pm by MathMate

algebra
The rectangular floor of a shed has a length 4 feet longer than its width, and its area is 140 square feet. Let x be the width of the floor. (a) Write a quadratic equation whose solution gives the width of the floor. (b) Solve this equation.
Sunday, July 8, 2012 at 8:46pm by bulatsu

Some points to remember: 1. Be sure to set your equations equal to 0. 2. See if the equation factors easily. 3. If it does, factor, then set each factor equal to 0. 4. Solve for the solutions. Let's look at your first equation: m^2 - 5m - 14 = 0 (I'm using ^2 to mean ...
Tuesday, January 10, 2012 at 5:48pm by MathGuru

algebra2
This looks like a "prime" quadratic. With trial and error trying: (-4t )(t ) or (-2t )(t ) you cannot get it to work. So there are no "interger" solutions. You can use the famous "quadratic equation" to get an approximation. ARe you familiar with ...
Tuesday, January 29, 2008 at 9:21pm by DanH

math
In google type : quadratic equation calculator steps When you see list of results click on : algebra . com / algebra / homework / quadratic / When page be open type your equation and click option : Submit Query You will see solution
Friday, October 26, 2012 at 3:09pm by Bosnian

Chemistry
Let me help somewhat here. 1. Although all those digits are correct, you need not include all of them for the Ka of 1.75 x 10^-5 (generally) is not known any better than three significant figures. Therefore, use 1.33 x 10^-3 as the answer. 2. Is there another way? yes. An ...
Saturday, January 19, 2008 at 5:50am by DrBob222

Draw the triangle with vertices D(-2,1), U(4,9), and E(10,1) On a Graph. 2. Find DU, UE, AND DE. (Distance) 3. Classify Triangle DUE by its sides. 4. Write the standard form of the equation of each line: DU, UE, and DE.Also, find the slode and then the y-intercept. Start with ...
Thursday, March 20, 2008 at 5:49pm by Brian

math
Use the substitution u=x(1/3) The original equation 3x^(1/3) + 2x^(2/3) = 5 now becomes 3u + 2u&sup2; = 5 Solve by the quadratic formula for u, and finally replace u by x(1/3).
Tuesday, August 4, 2009 at 12:01pm by MathMate

First write this quadratic in its general form v^2 + 17v - 72 = 0 I cannot find any two numbers that have a difference of 17 and multiply to get 72 Secondly, the discriminant value is 17^2-4(1)(-72) = 577 This is not a perfect square, so the equation has irrational roots, ...
Wednesday, March 19, 2008 at 9:37pm by Reiny

Math (Trig)
put it in quadratic form. 2 (sinX)^2 + sinX-1=0 now solve for sin x using the quadratic equation a=2 b=1 c=-1
Sunday, December 16, 2007 at 6:55pm by bobpursley

Algebra
-&#8730;3, 3&#8730;3 Write a quadratic equation in the variable X having the given numbers as solutions. Type in standard form ax^2 + bx +c =0
Saturday, April 21, 2012 at 5:58pm by Stella

math
They want you to solve for the unknown variable. You need to rewrite the equation in quadratic form ax^2 + bx + c = 0, first of all. y^2 -6x = -7 can be rewritten y^2 -6x +7 = 0 Use the quadratic formula to solve. http://www.purplemath.com/modules/quadform.htm y = [6 +/-sqrt(...
Saturday, June 13, 2009 at 12:50am by drwls

trig
In the quadratic equation ax&sup2;+bx+c=0 b/a = -(sum of the two roots) c/a = product of the two roots. Assume a=1, then b=-(7-3i+7+3i)=-14 c=(7-3i)*(7+3i)=49+9=58 So the quadratic equation is x&sup2;-14x+58=0 Check by solving the equation and you should get back 7&...
Tuesday, December 21, 2010 at 5:33pm by MathMate

When a quadratic equation has one solution, there will be one x-intercept; when there are two solutions, there will be two x-intercepts and when the equation has no solution, the graph will have no x-intercepts",is there another way of determining this?
Wednesday, February 13, 2008 at 7:31am by Marysvoice

Math
We have a quadratic equation here. Do you want to factor this equation? What exactly do you want to do with this equation?
Tuesday, February 19, 2008 at 7:32pm by Guido

Math Algebra
Use the quadratic formula to solve for the variable, p. I would use google or another search engine to find the formula so you can plug all the numbers in correctly.
Tuesday, March 11, 2008 at 11:06pm by Lauren

algebra
y = x^2 - 18. To get vertex you try to write the equation in the form y=a(x-h)^2 +k, where vertex is (h,k) Our equation can be written as y=1(x-0)^2 +(-18) Comparing with the formula equation, we see that h=0 and k=-18 So vertex (0,-18)
Tuesday, November 16, 2010 at 12:04am by profkn

Calculus
Hi I have the same question. The first part is correct to find the maximum height, but while solving for the quadratic formula to find the velocity when it hits the ground, the answer is incorrect. (You would get 7.2749 and -0.27492 after solving the quadratic)
Tuesday, April 20, 2010 at 1:32am by Kelly

Alg 1
The quadratic formula and the discriminat. The daily production of a company is modeled by the function p=-w^2 + 75w - 1200. The daily production, p, is dependent on the number of workers w, present. If the break-even point is when p=0, what are the least and greatest number ...
Monday, April 15, 2013 at 11:53am by Jane

algebra
using quadratic formula 3y2=6+7y 3 y^2 -7y - 6 = 0 When using the quadratic formaul to find y, a = 3, b = -7 and c = -6 y = [-b +/- sqrt (b^2 -4ac)]/2a = {7 +/- sqrt (49 + 72)}/6 = {7 +/- 11)/6 = +3 or -2/3
Thursday, August 2, 2007 at 7:52pm by Susan

math, solving equation
by quick tries of x = ±1, ± 2, it shows on the first try that x = 1 is a solution so x-1 must be a factor do either long algebraic or synthetic division to show x^3 + 4x^2 - 3x - 2 = (x-1)(x^2 + 5x + 2) use the quadratic formula to find the other two roots.
Tuesday, September 25, 2012 at 3:41am by Reiny

Math
i'm a bit stuck with this.. 145/18 = x + x^2 what does x equal to? multiply each term by 18, then re-arrange to get 18x^2 + 18x - 145 = 0 This quadratic does not factor, so use the quadratic formula to get your two answers.
Friday, July 27, 2007 at 6:07pm by COFFEE

Algebra
Bob thanks for answering my question, it still seems a tad bit confusing as i was thinking to use a quadratic expression formula. the formula you used is a rational expression correct??
Tuesday, November 10, 2009 at 6:47pm by Stacy

math,correction
Problem 10 use the quadratic formula to solve each of the following quadratic equations. 2x^2-5x = 3 My answer: solutions are 3 and - (1)/(2) Problem 16 3x^2-2x+1=0 My answer: (2+- radical (-8))/(6)
Wednesday, March 28, 2007 at 6:47pm by jasmine20

math
y-intercepts are easy. Just plug in x=0 and evaluate y x-intercepts involve factoring the quadratic and pick each x-value where y=0. 1st: y-intercept is at (0,-7) f(x) = 7x^2 + 6x - 7 use quadratic formula to find y = 0 when x = (-3 ± &#8730;58)/7 2nd: y-intercept ...
Sunday, December 11, 2011 at 6:29pm by Steve

math
chandice, it's better to post a new message when you have a new question. Anyway, the discriminant of a quadratic is b^2-4ac, the bit inside the square root sign of the quadratic formula. In this case: b^2-4ac =7^2-4*5 which is greater than zero. What does that tell you ...
Sunday, November 8, 2009 at 1:38pm by TeacherJim

Algebra
For a quadratic equation ax&sup2;+bx+c = 0 ...(1) the discriminant is the algebraic value of b&sup2;-4ac For any given quadratic, you would rearrange it to have the form of equation (1) above, and calculate b&sup2;-4ac. For example, x^2 = 4 can be written as x^2 + ...
Wednesday, September 22, 2010 at 5:13pm by MathMate

math/algebra
f(x)=-x^2+2 the maximum y-value is y= ------------------------------------ x^2+14x=-8 what value should be added to both sides of the equation? the answer should be an integer or simplified fraction. ---------------------------------------- y=x^2+6x-2 use the quadratic formula...
Sunday, February 17, 2013 at 6:17pm by mrs.maxwell

Algebra II?
I am having trouble with these. I don't even know where to start: Find the exact solutions to 6x^2+x+4=0 By using the Quadratic Formula. Find the value of the discriminant for 9x^2+1=6x. Then describe the number and type of roots for the equation. Thanks =)
Tuesday, June 24, 2008 at 2:02pm by Kasey

y=-1/4x^2-24 Hints: If the leading coefficient of a quadratic expression is negative, it opens downwards. For a general quadratic equation y=ax&sup2;+bx+c, The axis of symmetry is at the line y=-b/2a
Thursday, March 1, 2012 at 7:32pm by MathMate

two consecutive integers: x and x+1 &lt;the sum of whose squares is 1 more than twelve times the larger..&gt; x^2 + (x+1)^2 = 12(x+1) + 1 expand and solve as a quadratic equation. (see if you can come up with 6,7 or -1,0 )
Sunday, March 29, 2009 at 12:54pm by Reiny

algebra
by inspection, x=-3 is a solution. -27+72-30-15=0 so, divide (x+3) into x^3+8x^2+10x-15 and get the quadratic. Then solve it with the quadratic equation. I get x^2+5x-5 check that.
Friday, December 9, 2011 at 4:36pm by bobpursley

math: precal
LOL lots of ways. If it is quadratic, use the quadratic equation. Try to factor it. If (ax+b)is a factor then it is zero when x = -b/a Graph it and look for crossings of the x axis. etc
Sunday, March 20, 2011 at 4:54pm by Damon

Algebra
A = Area F = Fencing W = Width L = Length A = W * L = 650 m ^ 2 W * L = 650 Divide both sides by L W = 650 / L F = 2 W + 2 L = 2 ( W + L ) = 110 m 2 ( W + L ) = 110 Divide both sides by 2 W + L = 110 / 2 W + L = 55 650 / L + L = 55 Multiply both sides by L 650 + L * L = 55 L ...
Friday, March 16, 2012 at 11:39am by Bosnian

Chemistry
Write a balanced chemical equation for the combustion of trioleylglycerol. The molecular formula is C57H110O6.
Tuesday, January 22, 2013 at 6:09pm by Timofey

Chem Hmwrk
For the reaction HCl + AgNO3 &#8594; ,write the balanced formula equation
Thursday, October 11, 2012 at 12:54am by Jena

Math
are you solving -4x^3 + 15x^2 - 1 = 0 ? then 4x^3 - 15x^2 + 1 = 0 to solve cubics I use this webpage cubic equation calculator, since there is no easy way to do this. http://www.1728.com/cubic.htm It showed that x = -1/4 is a solution, so divide 4x^3 - 15x^2 + 1 by (4x+1) to ...
Monday, November 8, 2010 at 5:35pm by Reiny

algebra
if x=3, then f(x)=0, so put in x=3 into f(x)=0 and solve for b. Now that you know b, you can divide out the factor (x-2) and are left with a quadratic 3x^2+ ... which if =0, then you can factor or use the quadratic equation to find those two roots.
Monday, April 16, 2012 at 4:03am by bobpursley

trig
find the exact solutions (è in degrees) sin^2è+2cosè=-2 change the sin^2 to 1-cos^2, then rearrage the equation into quadratic form, use the quadratic equaion.
Monday, April 16, 2007 at 7:44pm by Devon

Chemistry
WRITE THE BALANCED CHEMICAL EQUATION,WRITE THE OVERALL IONIC EQUATION,IDENTIFY THE SPECTOR IONS AND POSSIBLE PRECIPITATES,WRITE THE NET IONIC EQUATION FOR mercury(II)chloride(aq)+potassium sulfide(aq)
Wednesday, February 9, 2011 at 8:43am by Jasmine

Factoring
I wouldn't factor it to get the solutions. I would use the quadratic formula. p= (-84 +- sqrt (7056+2345)/-6 p= (-84 +- 102.53)/-6 p=31 or p=-3.09 Now factoring.. (3p-93)(p+3.09) check that, of course I rounded in the quadratic...
Sunday, November 25, 2007 at 7:14pm by bobpursley

chem help
i just don't know where to begin/how a) Write a balanced chemical equation for: potassium carbonate + magnesium chloride b) Write a balanced chemical equation for: sulfuric acid + calcium carbonate c) Write a balanced chemical equation for: sodium sulfate + calcium nitrate...
Tuesday, January 15, 2013 at 1:49pm by thad

algebra
algebra, write a quadratic equation in the variable x having the given numbers as solutions -ã10, 6ã10
Friday, April 1, 2011 at 2:06pm by Shirley

algebra
The equation is in the form ax^2 + bx + c = 0 -3x^2 + 7x = 0 So, a = -3, b = 7, and c = 0 b^2 - 4ac = 49 - 0 = 49 The square root of a positive number is a real number, so there are 2 real solutions by the quadratic formula.
Monday, July 20, 2009 at 7:57pm by Marth

Are you confusing the word equation for formula? The formula is Al(NO3)3. There is no "equation" unless you want an equation for the formation of Al(NO3)3.
Friday, June 15, 2012 at 9:29pm by DrBob222

math
solve 730 = -16t^2 + 250t 16t^2 - 250t + 730 = 0 (use the quadratic equation formula)
Monday, July 11, 2011 at 5:02pm by Reiny

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