# quadratic equation

30,341 results, page 2

### math

how would you solve for y in this problem: x=(y^2+3y)^(1/3) would it equal: y= x^3/y - 3 ? and what about this problem: x= 1/[(y^2+3y-5)^3] would it equal: y = y/x + 5/y - 3? I would appreciate your help very much! <<how would you solve for y in this problem: x=(y^2+3y...

### precalculus

Are my answers correct if not which are right? Find the second difference for the sequence. 7, 6, 7, 10, 15, 22, …. 1 2 3 5 answer:a Find first differences for the sequence in order from a1 to a5. Determine whether or not the series is quadratic or not. -1, -3, -1, 5, 15 2, ...

### Quadratic equations

OK. I think I have my head around most of this but for one question. I have plotted a graph with the quadratic equation tickets=-02x^2+12x+11. My graph opens down and shows I will sell tickets for 60 days peaking at the vertex at 30 days where I sell 191 tickets. Now I have to...

### Math

How would I simplify this quadratic equation: y=-15/20.25(x^2+3x+2.25)+0 This is my work already done the original equation I was given but I need help simplifying the equation I have found.

### trig

if one of a quadratic equation is 1/2-2i, what is the equation. the other root is 1/2+2I but i don't know how to find the equation

### 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 You have to use the quadratic equation, we will be happy to check your work. the ...

### Algebra 1

Which method is the best method for solving the equation 8x^2-123x+3=0 square roots factoring graphing quadratic formula my answer is quadratic formula

### Math

1)Write a quadratic equation with integer coefficients that has -4+7i(Radical 3) and -4-7i(Radical 3) as its roots. 2) Solve your answer to part 1 using the quadratic formula verifying your answer

### math

15t^2+7t=2 The quadratic formula tells you that the solutions are: t = [-b +/-sqrt (b^2 - 4ac]/ (2a) In this case, a = 15, b = 7 and c = -2 solve the equation for t. What values for t will you get when you substitute the values you listed for a, b, and c in the quadratic formula?

### math help

write the quadratic equation whose roots are -4 and -5 and whose leading coefficient is 5 use the letter x to represent the variable. use the quadratic formula to solve for x 4x^2-9x+3=0

### MATH

Find all real solutions of the equation by first rewriting the equation as a quadratic equation. (Enter your answers as a comma-separated list.) 4x4 + 15x2 − 4 = 0

### Pre calc aesthetic quadratic stuff

two numbbers have sum of 9 and product of 20. What singlevariable quadratic equation in form of ax^2+bx+c=0 can be used to represent the product of the two numbers

### Algebra

A monic quadratic is a quadratic in which the coefficient of the quadratic term is 1. For example, r^2 - 3r + 7 is a monic quadratic, but 3t^2 - 3t + 1 is not. A teacher writes a monic quadratic on the board. Joanie copies the quadratic onto her paper, but writes down the ...

### Algebra

A monic quadratic is a quadratic in which the coefficient of the quadratic term is 1. For example, r^2 - 3r + 7 is a monic quadratic, but 3t^2 - 3t + 1 is not. A teacher writes a monic quadratic on the board. Joanie copies the quadratic onto her paper, but writes down the ...

### Maths

Hey my question is How do we get the triangular numbers sequence ( general statement ) by the quadratic formula ? Can you shoe me steps please ? The triangle numbers are : 1 , 3 , 6 , 10 , 15 how do I get them in the form of a quadratic equation if a , b and c are unknown ? ...

### college math

I'm hoping I did thesse right. Solve each quadratic equation. (I don't know how to do symbols on here so i'll write it out in word form) The equation is: x squared + 3x+4=0 I said its not possible because i got x=3 + or - the square root of -7/2 and you cant find a square root...

### math

(4-y^2)/(y-2) = y/2 (4-y^2)/(y-2) = y/2 4 - y^2 = (y*(y-2))/2 4 - y^2 = (y^2-2y)/2 8 - 2y^2 = y^2 - 2y 3y^2 - 2y - 8 = 0 (keep the above equation in mind) quadratic formula: (-b +/- sqrt(b^2 - 4ac))/2a now solve by plugging in the appropriate numbers and choose (normally) the ...

### Algebra 2

Explain how you can tell what kind of conic section a quadratic equation describes without graphing the equation. Can you do this by writing the equation in standard form? (That's what my answer key says... but I don't know how/if it's actually right)

### Algebra

For this equation x^(2) + x + 2 which you can't factor but then you can use the quadratic formula but than why is the answer no real solutions when I can use the quadratic formula?

### Math

(1 & 2) The first three points do not fall on a straight line, and there is no value of k that will make that happen. (4) To find the quadratic y = a x^2 + bx + c that passes through the first three points, solve simultaneously 1 = c 3 = 4a + 2b + c 6 = 16 a + 4b + c 2 = 4a + ...

### Quadratic equations

I need to provide a quadratic equation that models the number of expected tickets sold each day x. (x=1 is the day tickets go one sale). tickets=-0.2x^2+12x+11

### Math

-x^3 + 1.85x^2 - x +0.15 = 0 how can you solve for x? An exact solution or a numerical solution? Exact solutions can be obtained as follows: x^3 - 1.85x^2 + x - 0.15 = 0 First get rid of the quadratic term by substituting: x = (y + 1.85/3) You then obtain an equation of the ...

### physics repost

I am still trying to solve for H in this equation but I am still lost MgH = (1/2)*k*(H-2-10)^2 + Mg*2 I was told to expand the square on the right, gather terms, put it in the standard quadratic form, and use the quadratic formula, but I don't know how. Should it be Mgh=(H-12...

### physics repost

I am still trying to solve for H in this equation but I am still lost MgH = (1/2)*k*(H-2-10)^2 + Mg*2 I was told to expand the square on the right, gather terms, put it in the standard quadratic form, and use the quadratic formula, but I don't know how. Should it be Mgh=(H-12...

### Precalculus

Consider the equation 7sin^2x - (4sin2^x)/cosx = -1 a) Put the equation in standard quadratic trig equation form. Why is it 7sin^2x - 8sinx + 1 =0?

### college

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form ax^2 + bx + c =0 The solutions are -10, 3 The equation is blank = 0

### Algebra

Solve the equation. Use factoring or the quadratic formula, whichever is appropriate. Try factoring first. If you have any difficulty factoring, then go right to the quadratic formula. (Enter your answers as a comma-separated list.) (x+2)^2 + (x-7)(x-2)=16

### algebra

solve for x (24+2x)(10+2x) - 240 = 152 First multiply. 24(10) = ___ 2x (2x) = ____ Now subtract 240. Can you finish the problem from here? dont i need to put this in equatic equation to solve for x. cause i need to find the width of a small rectangle inside a bigger triangle. ...

### Algebra

how to solve this: what is the largest rectangular area that can be enclosed with 400 ft of fencing? What are the dimensions of the rectangle? Could someone write the equation. I know how to solve it without an equation but I want to know the equation. would it be a quadratic?

### ALGEBRA

how do i solve this linear equation: 3x/4 + 6 = -12 (3x over 4 is a fraction) and this quadratic equation..... -4x squared = 0??

### maths

The following quadratic equation has the integer solutions x^2+5x-6=0 what is the positive solution of the equation

### Math

Could someone help me with this equation? Use the quadratic formula to solve the equation... 2x^2 - x = -10

### Equation

-4x (little 2) =0 Not sure what name the technique means. I know this is a Quadratic Equation.

### Algebra1 HELP PLEASE

The solutions to a quadratic equation are -1 and 7. What is the equation of its axis of symmetry?

### maths

quadratic equation solve the equation by factorization 27x^2 - 126x = 0 So x=? or x=?

### Algebra

The following equation is quadratic. f(x)=(x-7)(3x-2) What are the x-intercepts of the graph of the related equation y=(x-7)(3x+2)? A) -7 and 2/3 B) -7 and 3/2 C) -3/2 and 7 D) -2/3 and 7

### Algebra

Please show me how to solve this problem. 8/x^2-16 + 3/4 = 1/x-4 multiply each of the terms by x^2, collect your like terms and bring them all to the left side. You will have a quadratic equation. BTW, since you did not use brackets I will assume your last term is (1/x)-4 and ...

### Algebra help

Match the equation 4x^6-2x^3+1=0. With a substitution from the column that could be used to reduced the equation to quadratic form: a) u=x^-1/3 b) u=x^1/3 c) u=x^-2 d) u=x^2 e) u=x^-2/3 f) u=x^3 g) u=x^2/3 h) u= x^4

### Algebra help

Match the equation 4x^6-2x^3+1=0. With a substitution from the column that could be used to reduced the equation to quadratic form: a) u=x^-1/3 b) u=x^1/3 c) u=x^-2 d) u=x^2 e) u=x^-2/3 f) u=x^3 g) u=x^2/3 h) u= x^4

### Math

1)If the roots of a quadratic equation are -2 and 3, the equation can be written as A) (x+2)(x+3) B) (x-2)(x+3)** C) (x+2)(x-2) D) (x-2)(x-3) Is the answer B? If someone could help me that would be great.

### math,help,algebra I

I need help can someone help me get unstuck and let me know if i am correct.thank you. solve by completing the square. 4x^2+2x-3=0 this is what i am doing: i used the quadratic equation. so where i am is in this step: x = (-2 (+-) sqrt (-44))/(8) from this point i am stuck: ...

### Chemistry

What is the pH of a 1.0E-8 M solution of HCl? Please note that you cannot simply add the contribution of H+ ions from the autoproteolysis of water and the contribution from the dissociation of HCl. You will need to use the quadratic equation to solve this problem and report ...

### math

Use quadratic formula to solve each equation 3k^2+6=6 I get 3/2 but I can't seem to get the other half of the equation such as x=3.7 or .26 etc...

### algebra2

If the discriminant of a quadratic equation is equal to zero, how many real solutions does the equation have? A. 0 B. 1 C. 2 D. 3 please help!!

### algebra1please look over THANK YOU

The solutions to a quadratic equation are -1 and 7. What is the equation of its axis of symmetry? I GOT 3 is that right

### quadratic equation

what's the positive root of the following equation x(square)=7x+8

### quadriatic equation

solve and check each of the following quadratic equation (1)x^+x-6=0 (2)x^+8x+15=0 (3)x^+2x+1=0 (4)x^-3x-4=0 (5)x^-4x-32=0

### algebra

how do you change the equation 0.2=x^2/55-x into a quadratic equation. I have 1/5(55-x)-x^2=0

### algebra

Hi Dear Jiskha team, I have Algebra homework and I will need some help. The homework is following: Suppose you are using a computer to draw a face on a coordinate plane. The eyes are at (–3, 3) and (3, 3). The tip of the nose is at the origin. To make a smiling mouth, you ...

### College Algebra

Solve the following equation in the complex number system x^4+x^3+4x^2+10x-60=0 College Algebra - Reiny, Monday, January 2, 2012 at 11:49pm hint x = 2 and x = -3 are roots so either do long division by x-2 and x+3 to get a quadratic or do it by synthetic division. Solve that ...

### math

Can someone explain how to label the vertex of this equation. f(x)= -(1/2)x^2. i know how to do these question but when it actually has the other components to the quadratic equation.

### Intermediate Algebra

If the discriminant of a quadratic equation has the given value, determine the number and type of solutions of the equation. A.48 B.0

### Math(Please answer, thank you)

(4.44e-2 - x) (8.06e-2 - x) / (0.331 + 2x)^2 = 1.80e-2 I need to rearrange this equation so that I can get a,b, and c, for the quadratic equation but I am not sure how to do this. Thank you for the help.

### algebra

write a quadratic equation having the given numbers as solutions. -6 and -4 Not sure how this is to be written into an equation. Please help. Thank you

### MATH

(2,14),(1,-1),(3,35) Find the quadratic function y=ax^2+bx+c 1) 4a+2b+c=14 2) a+b+c=-1 3) 9a+3b+c= 35 equation 1&2 = 3a + b = 13 equation 1&3 = -5a +5b = -21

### Equation

Solve the quadratic equation. 12x2 + 23x + 10 = 0 A.5/4,2/3 B. 5/12, 1/5 C. 5/4, 2/3 D. 5/4, 2/3

### Algebra

Use the quadratic equation to solve the equation: 4k(k+13)=13

### Algebra

If the roots of a quadratic equation are -2 and 3, the equation can be written as a.(x+2)(x+3)=0 b.(x-2)(x+3)=0 c.(x+2)(x-3)=0 d.(x-2)(x-3)=0

### Algebra

1)Solve by factoring:5x^2=4-19x answer=-4,1/5 2)Which quadratic equation has roots 7 and -2/3? answer=A A.2x^2-11x-21=0 B.3x^2-19x-14=0 C.3x^2+23x+14=0 D.2x^2+11x-21=0 3)To solve 4x^2-28x+49=25 by using the square root property,you would first rewrite the equation as answer=(...

### algebra

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0. Solution:2

### algebra

Can you use algebra to find a quadratic equation if your know the coordinates of just ONE point on its graph? Can you use algebra to find a quadratic equation if your know the coordinates of just TWO points on its graph? If so, what information is needed?

### quadratic functions

The graph of a quadratic function can have 0, 1 or 2 x-intercepts. How can you predict the number of x-intercepts without drawing the graph or (completely) solving the related equation? Suppose that the graph of f(x) = ax^2+bx+c has x-intercepts (m,0) and (n,0). What are the x...

### Math

(2,14),(1,-1),(3,35) Find the quadratic function y=ax^2+bx+c 1) 4a+2b+c=14 2) a+b+c=-1 3) 9a+3b+c= 35 equation 1&2 = 3a + b = 13 equation 1&3 = -5a +5b = -21 i know you take those two equations now 3a + b = 13 -5a - 5b = -21 multiply the top by 5 and the bottom equation by 3 ...

### algebra

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0 -sqrt3, 3sqrt3

### maths

By making the substitution u=7^x and using part a, derive a hidden quadratic equation 7^(2x-1) +4×7^(x-1) -1/14 =0 and hence find all of the solutions to the above equation.

### Maths

By making the substitution u=7^x and using part a, derive a hidden quadratic equation 7^(2x-1) +4×7^(x-1) -1/14 =0 and hence find all of the solutions to the above equation.

### AlgebraB-2

A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = 0.04x+ 8.3x + 4.3, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ...

### algebra

Write a quadratic equation in the variable x, having the given numbers as solutions. Type the equation in standard form, ax^2+bx+c=0. The soluation is 8 and is the only solution.

### Pre-Calc

Solve the quadratic equation by factoring. Check your solutions in the original equation. (Enter your answers as a comma-separated list.) x^2 + 2ax + a^2 = 0

### MATHS URGENT

By making the substitution u=7^x and using part a, derive a hidden quadratic equation 7^(2x-1) +4×7^(x-1) -1/14 =0 and hence find all of the solutions to the above equation.

### Quadratic Functions

Please explain to me how to do the following problems, I don't understand them. Thanks! Find the x-intercepts (if any) for the graph of the quadratic function. 1.f(x) = (x + 2)2 - 4 Find the y-intercept for the graph of the quadratic function. 5.y + 9 = (x + 3)2 Find the ...

### math

2.Define the shape of the rectangular area by establishing a relationship between the length and width of the rectangle. For example, L = 2W + 5, or W = 3L – 4. Be sure to include the appropriate units (inches, feet, yards, miles, or meters). 3.Using the fact that A = LW, ...

### College algebra

Given a quadratic equation in the form y = ax2 +bx +c , and four choices of graphs representing that equation, how can you tell which choices could be eliminated right away by looking at the equation and looking at the graphs and doing some minimal calculations and not ...

### MATH

Sketch the graph of a quadratic function for which the related quadratic equation has only one solution. Then, sketch one that has two solutions. Explain how you know by looking at the graph the number of solutions there are.

### math

Sketch the graph of a quadratic function for which the related quadratic equation has only one solution. Then, sketch one that has two solutions. Explain how you know by looking at the graph the number of solutions there are.

### add maths

Given that the quadratic equation is (2m+3)x^2+(4m-2)x-(m+1)=0.Find the value of m,if •one of the root of the equation is negative •one of the root of the equation is reciprocal of the other

### questions

1.) Why are there usually two solutions in quadratic equations? 2.) Under what situation would one or more solutions of a rational equation be unacceptable? If putting the found "solution" cannot be put back into the original equation without violating fundamental math rules, ...

### Quadratic equation...

Hi Can anyone help me solve the quadratic equation for the following:- The motion of a two stage rocket is stated by it height y in metres above the ground since t seconds since launch. Flies vertically Ist stage burns for 5 seconds and cuts out. 2nd stage rocket is under ...

### Math

Solve the following quadratic equation(as exact values) using the quadratic formula. x^2-10x-15=0 I got 5+-2sqrt10/2. ^ Sorry hard to write it out. But basically there is a 5 there, the negative sign is supposed to be under the positive sign, then there is a two outside of the...

### Math quadratic function

Jose bautista hits a baseball that travels for 142m before it lands. The flight of the ball can be modelled by a quadratic function in which x is the Horizontal distance the ball has travelled away from jose, and h(x) is the height Vertical distance of the ball at that ...

### Math

One student studied for 8 years in college and her tuition bills are recorded. Years. One semester tuition 1. 4680 2. 4960 3. 5510 4. 6060 5. 6845 6. 7600 7. 8435 8. 9250 Construct the scatter plot for the data with the scales.choose 3 points,find a quadratic equation in ...

### math,algebra,help

Is this right: Solve: x^2+16x+60=0 this is what i did: i used the quadratic formula and this is what i ended up with. x = -8 +- (sqrt(16))/(2) Which is -8 +-2 Or you could have factored the quadratic (x+10)(x+6) Which is -8 +-2 Or you could have factored the quadratic (x+10)(x+6)

### Math 3

Solve by factoring: One of the solutions to the quadratic equation x^2 - 13x + 30 is 3. What is the other solution? Is it:(x+3) If 3 is a solution, then the quadratic contains a factor (x-3). The other factor is thus (x-10), and it follows that the other root is x = 10. thanks...

### pre calc

Solve: (x+5/x)+(6/x-4)=(-7/x^2-4x) I multiplied the entire function by x and x-4 and after doing that I got down to the quadratic equation x^2+7x-13=0 I did the quadratic and got x=1.525 and -8.525 I feel like I made a mistake because when I plug in both of those answers for x...

### Pre Calc still confused

Solve: (x+5/x)+(6/x-4)=(-7/x^2-4x) I multiplied the entire function by x and x-4 and after doing that I got down to the quadratic equation x^2+7x-13=0 I did the quadratic and got x=1.525 and -8.525 I feel like I made a mistake because when I plug in both of those answers for x...

### cal

find the equation of a quadratic function whose graph is tangent at x=1 to the line whose slope8, tangent at x=-2 to solve the line with slope-4 and tangent to the line y=-8 find the equation of the tangent lines at x=1 and x=-2 graph the quadratic function obtained and the 3 ...

### algabra

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard from, as^2+bx+c=0 the solutions are (-3,1)

### Math

How can I find the point of intersection of the graphs x^2=y=4 and 2x-y=1 by hand? I can do the problem using a calculator, but I don't know how to do it by hand. I tried using substitution, but I ending up getting x^2+2x-5=0. It would not factor evenly. Should I use the ...

### quadratic equation

(x + 6)2 = 49

### Math

Can someone please explain how to solve 3x^2+7x-15=0 by using the quadratic equation? I know that the equation is: ax^2+bx+c=0 but I get confused about how to set the problem up and solve. Thanks.

### trigonometry

Complete the square to Solve Quadratic Equation: Solve the equation. Express the answer in simplest radical form. -x^2-7x=-11 Please Help!!!! Thanks.

### trigonometry

Complete the square to Solve Quadratic Equation: Solve the equation. Express the answer in simplest radical form. -x^2-7x=-11 Please Help!!!! Thanks.

### Math

Find the discriminant of the quadratic equation and give the number and type of solutions of the equation. s^2√5 + s + √5 = 0 I'm confused because of the radical...

### Algebra-Please help-I'm confused

This deals with quadratic functions-If I have a graph with h = (-5)and k =3 and they ask for the translation, would it be {5,3} or would the translation just be {-5,3} Do you take the opposite of the number when it is transalated from the graph or do you only take the opposite...

### 8th Grade Algebra

You know how to solve quadratic equations using algebra, graphs and the quadratic formula. Sometimes one method of solving is more convenient than another method. Describe how you would solve each equation. Give reasons for you answers. A) 16x^2 = 1600 B) x^2 - 350 = 0 C) x^2...

### math

Jenny wanted to solve the quadratic equation x2 - 11x +18 = 0 by factoring. Which of the following equations would lead her to solve the given equation?

### trig

how do you start this equation i've been tryng it for 20min. sec^6x(secxtanx)-sec^4x(secxtanx)=sec^5xtan^3x ec^6x(secxtanx)-sec^4x(secxtanx)=sec^5xtan^3x Factor out a sec^5 tan and divide thru. Left is sec^2 x = Tan^2 x Then this should reduce to sin^2 x = cos^4 x take the ...

### Algebra

This deals with quadratic functions-If I have a graph with he = (-5)and k =3 and they ask for the translation, would it be {5,3} or would the translation just be {-5,3} Do you take the opposite of the number when it is transalated from the graph or do you only take the ...

### Algebra

Write a quadratic equation in the variable x having the given numbers as solutions. Type the equation in standard form ax^2+bx +c = 0 The solution is 6 only solution.