Friday

December 19, 2014

December 19, 2014

Number of results: 96,833

**Algebra**

State the possible number of imaginary zeros of g(x)= x^4+3x^3+7x^2-6x-13 this is how far Ive gotten:there are 4 zeros,3 positive and 1 negative If you've found four real zeroes, then there are no imaginary zeroes. You can also see that there are no imaginary zeroes directly: ...
*August 10, 2007 by Marissa*

**Precalculus**

"Show that x^6 - 7x^3 - 8 = 0 has a quadratic form. Then find the two real roots and the four imaginary roots of this equation." I used synthetic division to get the real roots 2 and -1, but I can't figure out how to get the imaginary roots. I checked HotMath but all it showed...
*September 20, 2009 by Emily*

**Math**

Which describes the number and type of roots of the equation x^2-625=0? A)1 real root, 1 imaginary root B)2 real roots, 2 imaginary roots C)2 real roots D)4 real roots I went with A sqrt x^2= x (which would be the imaginary) and sqrt 625= 25 (the real)
*February 20, 2008 by Jon*

**algebra ll-imaginary numbers**

where can i find hepl online about imaginary numbers? i do not understand them.
*March 18, 2009 by coral*

**Algebra**

The function 5x^2+2x-1's domain is all real numbers, according to the answer key. However, I don't know how to factor this to prove it. Could you show me? The function the sq. root of y-10 has a domain of all numbers so that y is greater than or equal to zero. But I don't see ...
*November 1, 2009 by Anneliese*

**algebra2-imaginary numbers**

You can add or subtract complex numbers by treating the i as a variable and combining like terms. I am having a lot of trouble figuring out these equations with imaginary numbers. 1. (3+2i)+(7-i)= 2.(1-6i)+(2-i)= 3. (2+i)-(3+i)= 4.(4+i)-(2-i)= Can someone please walk me ...
*January 16, 2007 by chrissy*

**maths**

Suppose z=a+bi, where a and b are integers and i is the imaginary unit. We are given that |1+iz|=|1−iz| and |z−(13+15i)|<17. Find the largest possible value of a+b. Details and assumptions i is the imaginary unit, where i^2=−1.
*April 3, 2013 by rohit*

**Algebra**

The function f(x)=x^4−10x^3+40x^2−80x+64 has four complex roots, one of which is 2−2i. What is the sum of all real and imaginary coefficients of these roots? i here is imaginary unit i.e. i^2 = -1
*March 18, 2013 by Stranger*

**Calculus**

find the intervals on which f(x) is increasing and decreasing along with the local extrema. f(x)=x^4 + 18x^2 I took the derivative and got: f'(x)= 4x^3 + 36x When I set this to zero, I get the imaginary number 3i. I can't get test values for an imaginary numbers, so I can't ...
*November 3, 2014 by Leah*

**Maths**

Suppose z=a+bi, where a and b are integers and i is the imaginary unit. We are given that |1+iz|=|1−iz| and |z−(13+15i)|<17. Find the largest possible value of a+b. i is the imaginary unit, where i^2=−1.
*April 5, 2013 by Oian*

**Maths**

The function f(x)=x^4−15(x^3)+81(x^2)−201x+182 has four complex roots, one of which is 3−2i. What is the sum of all real and imaginary coefficients of these roots? Details and assumptions i is the imaginary unit, where i2=−1.
*April 16, 2013 by OIan*

**Imaginary land Homework poster**

create a 2-D or 3 -D imaginary land. Land must include at least 5 of the following landforms: volcano, mountain range, plateau, valley, island, lake, peninsula, plain, and river to create a SNAZZY name.
*November 10, 2011 by gracie*

**Math**

Hi, I have to write a research paper and I decided to write about the history/importance of imaginary numbers. I don't know how to get started though, can you please help ! By the way I know how to write a research paper so don't give me the links about how to write 1. Instead...
*April 1, 2011 by Jon*

**math**

How do I write 5e^(-2j) in real and imaginary forms?
*October 14, 2008 by steve*

**Math**

(5-4i)/(8+i) ~ simplify the expression (i=imaginary #) help plz! thanks!
*December 27, 2008 by Naoko*

**Math - Imaginary**

(i)(4i)(-4i) it is 4i^2(-4i) = -16i^3 ? If it is not right, please help. thanks!
*September 30, 2012 by John*

**Math, ASAP Please**

What is an Imaginary Number?
*October 8, 2014 by Katt<3Bob\by*

**Math**

find all real and imaginary solutions x^(2/3)-2=x^(1/3)
*October 21, 2010 by Samantha*

**Math**

Find all real or imaginary solutins to each equation. 3y(2)+4v-1=0
*July 31, 2008 by Marilyn*

**Math - Imaginary Numbers**

I just need help with these questions, thanks. i^5 3(-2i)^2 -i(isqrt5)^2
*September 11, 2008 by Lucy*

**math**

The imaginary number i is defined such that i2 = 1. What does i + i2 + i3 + ... + i23 equal?
*September 24, 2010 by Cennie*

**math**

solve the equation for all real and imaginary solutions (x-3/2)^2-2(x-3/2)+26=0
*October 21, 2010 by Allie*

**math**

Find all real and Imaginary solutions 7x^(3)+70x^(2)-x-10=0
*October 26, 2010 by Samantha*

**Math**

What can you multiply an expression by to eliminate the imaginary part of the denominator? 1.) (2+4i)/3i= 2.) (1-2i)/2i=
*October 8, 2014 by Nicki*

**math**

Find all zeros. Real and Imaginary f(x)= 5x^4 + 16x^2 + 3
*November 17, 2014 by maria*

**algebra**

question The square root of a negative number is imaginary. That is you cannot find, for example, sqrt(-49) . Why? my answer Yes you can, however this is aginst the normal operations non teh less we are dealing with iminiganary numbers so, as such the square root of a ...
*June 30, 2008 by tony*

**Homework (Math)**

What can you multiply this expression by to get rid of the imaginary part of the denominator? (1-2i)/2i
*October 8, 2014 by Stephanie*

**math**

find the imaginary solutions of the equation by factoring. x to the third power - 16x = 0
*January 16, 2012 by Ryan*

**Math**

imaginary numbers Find the reciprocal of 2-7i and express it in terms of a+bi I need help please and thank you
*March 12, 2012 by Anonymous*

**Math**

Find the real and imaginary parts of the following complex numbers: (i) 1.5e^jπ/4 (ii) je^1.2 + j^2 e
*April 10, 2014 by Mat*

**Math**

Find all real or imaginary solutions to each equation. Use the method of your choice. 3y + 4v 1 = 0
*July 30, 2008 by Marilyn*

**math**

how many different 9-letter words (real or imaginary) can be formed from the letters in the word ECONOMICS?
*July 16, 2010 by sha*

**Math ( Pre Calc)**

Find all real and imaginary roots of the polynomial equation 3x^4-x^3+4x^2-2x-4=0
*October 2, 2012 by Ains*

**math (trig)**

Im having problems solving this equation: 2sin(x) = cos(x) + 2 I keep getting an imaginary number..:/
*December 18, 2007 by jess*

**Algebra II**

Which describes the number and type of roots of the equation x^2 -625=0? A. 1 real root, 1 imaginary root B. 2 real roots, 2 imaginary roots C. 2 real roots D. 4 real roots. I have x^2 = 625 x = 25 answer: 2 real roots (25 or -25) Is this correct? Thanks
*March 16, 2008 by Lucy*

**math**

how many diferrent 9-letter words (real or imaginary) can be formed from the letters in the word ECONOMICS? the ans. must be 90,720
*July 18, 2010 by sha*

**algebra**

What are the intercepting points of y^2=-4x and x^2=y I set both equations equal to 0, but only get x=0 and there is another intercepting point. please help! Graphically, y=x^2 is positive for all values of x, whether positive or negative. The second equation is y positive for...
*December 7, 2006 by mary*

**Math 111**

Solve the equation by the square root property. If possible, simplify radicals or rationalize denominators. Express imaginary solutions in the form a+bi. [X+ 2/3]^2=10/9
*April 2, 2010 by Anonymous*

**math**

Hello, I'd like to know how in developing, factoring or simplifying, we can move from: goo.gl/zZdzSs ACDE are strictly positive real constants. I is an imaginary number.
*November 2, 2013 by Karl*

**MATH**

How can you factor x^4 +1? If you go to the imaginary plane, it factors to (x^2 + i)(x^2-i) I need to factor by difference of squares. How can I do this?
*March 25, 2007 by Mike*

**math**

If the roots of the eqn x-2cx+ab=0 are real and unequal, then prove that the roots of x-2(a+b)x+a+b+2c=0 will be imaginary.
*July 5, 2014 by tanu*

**Math**

Solve: (don't forget about imaginary numbers) 5x^2-7x+12=0 how do I solve this? please help and thank you
*March 12, 2012 by Anonymous*

**math**

find whether the line 2x-y=0 is tangent, real chord on imaginary chord to the parabola y^2-2y+4y=0.
*August 8, 2011 by sonu*

**math**

solve and simplify the answer completely by using pure imaginary numbers/complex numbers. 2x^2+3x+2=0
*December 4, 2008 by anonymous*

**algebra,math,**

is this factorable its a trinomial: x^2+2x+3 No, not factorable in the real number system. b^2 -4ac is negative, so the roots are imaginary.
*April 18, 2007 by jacky20*

**math**

Solve: (don't forget about imaginary numbers) 5x^2-7x+12=0 how do I solve this? do I need to use the quadratic formula? please help and thank you
*March 12, 2012 by Anonymous*

**math**

Suppose z=a+bi, where a and b are integers and i is the imaginary unit. We are given that |1+iz|=|1−iz| and |z−(13+15i)|<17. Find the largest possible value of a+b.
*April 5, 2013 by ayan*

**Math**

Hello, I'd like to know how in developing, factoring or simplifying, we can move from: A + ( (1 / ( (1 / ICD) + IED) ) to: ACD *( ( - ED + I ) / (1 - ECD^2 ) ) ACDE are strictly positive real constants. I is an imaginary number.
*November 2, 2013 by Karl*

**MATH**

USING AM IMAGINARY FIGURE OF $19,250.00 AS AN ANNUAL INCOME FIGURE, HOW MUCH MONEY COULD YOU SAVE A YEAR IF YOU BUDGETED HALF OF 2.4%?
*September 7, 2011 by J*

**math**

Hello, i would like to know what is the complex number of : (a*c*d)(-e*d+i)/(1-e*c*d^2) ACDE are strictly positive real constants. I is an imaginary number. Thanks you a lot for you help.
*November 2, 2013 by Karl*

**Math**

Hi, I have to write a research paper and I decided to write about the history/importance of imaginary numbers. I don't know how to get started though, can you please help ! :) thanks
*April 1, 2011 by Jon*

**math**

Hello, I'd like to know how in developing, factoring or simplifying, we can move from: A + ( (1 / ( (1 / ICD) + IED) ) to: ACD *( ( - ED + I ) / (1 - ECD^2 ) ) ACDE are strictly positive real constants. I is an imaginary number. Thanks a lot for your help.
*November 2, 2013 by Karl*

**Algebra**

8-6i / 3i 3i / 4+2i I = imaginary numbers
*November 1, 2014 by Amy*

**Precal**

What are the roots, real and imaginary of: Y=x^4-6x^3+9x^2-6x+8
*January 13, 2011 by Breana*

**Algebra 2..**

Simplify. 4i (imaginary number)
*November 30, 2012 by Anonymous*

**Imaginary numbers**

1/i^20 + 1/i^21 I got 1-i but i am not sure if that is right.
*January 15, 2008 by Amanda*

**Algebra**

real/imaginary solutions x^(2/3)+3x^(1/3)-10=0 u=x^(1/3) u^2=(x^(1/3)^2=x^(2/3) u^2+3u-10=0 (u+5)(u-2) u=-5 u=2 x^(1/3)=-5 x^(1/3)=2 (x^(1/3)^3=-5^3(x^(1/3)^3=2^3 x=-125 or x=8
*April 3, 2008 by Bill*

**HCA 220**

Yes Ms. Sue it has to be imaginary patient.
*January 21, 2010 by Isabel*

**math**

Use the rational zero theorem, Descartes rule of signs, and the theorem on bounds as aids in finding all real and imaginary roots to the following equation: 4x^(3)-17x^(2)+16=0
*October 25, 2010 by Allie*

**math**

You have a difference of squares (x^2-3)(x^2+3) One of these factors to two real roots, the other to two imaginary roots. You have a difference of squares (x^2-3)(x^2+3) One of these factors to two real roots, the other to two imaginary roots. Let g(x)= x^4 - 9 wat are the ...
*May 30, 2007 by bobpursley*

**Math Reiny question**

This is the problem you helped me with. I was curious, do I write the solution set as (1 + i33)/2, (1-i33)/2 change it to the standard form first x^2 - x + 7 = 0 a=1, b=-1, c = 7 x = (1 } (1 - 4(1)(7))/2 = (1 } -27)/2 Your answer is an imaginary number or called a ...
*September 24, 2010 by Sabrina*

**Math clarification Reiny**

This is the problem you helped me with. I was curious, do I write the solution set as (1 + i33)/2, (1-i33)/2 change it to the standard form first x^2 - x + 7 = 0 a=1, b=-1, c = 7 x = (1 } (1 - 4(1)(7))/2 = (1 } -27)/2 Your answer is an imaginary number or called a ...
*September 25, 2010 by Sabrina*

**algebra**

square root of -45? (using imaginary numbers)
*October 13, 2008 by krystal*

**composition writing**

can i get a paragraph on 'An imaginary trip to the moon'?
*January 3, 2012 by c*

**Algebra 2 ..**

Simplify. 4i ( What are the rules for simplifying these imaginary numbers?)
*November 26, 2012 by Anonymous*

**Algebra 2**

State the possible number of imaginary zeros of f(x)= 2x^3 - 4x^2 + 8x - 3. 0,1,3?
*May 18, 2013 by Lily*

**pre cal **

what are the real and imaginary zeros of the equation 2x^3 + 5x^2 - 3x + 7
*June 23, 2014 by alex*

**Physcis**

What is the radius of a real or imaginary nucleus of 42X^85?
*October 27, 2014 by Grace*

**Calculus II**

What is sin(i) -- (sin of the imaginary number, i) What is cos(i)-- cosine of the imaginary number, i orrr tan(1+i) You can derive these things from the equation: Exp(i x) = cos(x) + i sin(x) ---> sin(x) = [Exp(ix) - Exp(-ix)]/(2i) cos(x) = [Exp(ix) + Exp(-ix)]/2 tan(x) = 1...
*March 5, 2007 by Becky*

**algebra**

simplify the number using the imaginary unit i. √-16
*October 21, 2013 by johnny*

**Algebra Problem**

complete the square(real or imaginary) a^2-12a+35=0 my answers are a=7 a=5
*March 21, 2008 by Jim*

**Algebra**

Write all real and imaginary zeros. f(x)=x^3-8x^2+x-8 -8--1,-2,-4,-8 1 -+1,-+2,-+4,-+8 1-8 1-8 1 1-7-6 1 -7 -6 -14 2 1 -8 1 -8 2 -12 -22 1 -6 -11 -30 4 1 -8 1 -8 4 -16 -60 1 -4 -15 -52 answer (?) 8 is zero of f(x) 8 1 -8 1 -8 8 0 8 1 0 10
*April 3, 2008 by Lori*

**Algebra**

Write all real and imaginary zeros. f(x)=x^3-8x^2+x-8 -8--1,-2,-4,-8 1 -+1,-+2,-+4,-+8 1 -8 1 -8 1 1 -7 -6 1 -7-6 -14 2 1 -8 1 -8 2 -12 -22 1 -6 -11 14 4 1 -8 1 -8 4 -16 -60 1 -4 -15 -52 8 1 -8 1 -8 8 0 8 1 0 1 0 answer: 8 is zero of f(x)
*April 4, 2008 by Lori*

**algebra**

Find all real and imaginary solutions to equation. b^4+13b^2+36 = 0
*July 20, 2009 by Jessica*

**algebra**

simplify the number using the imaginary unit i. square root of -16
*December 19, 2013 by helen*

**Math**

Is there any one who knows if I am right? Do not solve, show possibilities of Descartes's rule of signs for roots. 4x^3-9x^2+6x+4=0 f(x)=4x^3-9x^2+6x=4 - + + one change =4(-x)^3-9(-x)^2+6(-x)+4 - + - + three changes Positive Negative Imaginary 2 1 0 1 2 0 3 possible roots
*April 4, 2008 by Larry*

**math**

Find the product and enter the real and imaginary parts below. Note that you do not need to type in the since it is already given to you. Simplify your square roots as much as possible. sqrt-27((sqrt-5)-(sqrt-11))
*September 13, 2011 by john*

**Math**

Factor the polynomial as the product of factors that are irreducible over the real numbers. Then write the polynomial in completely factored form involving complex nonreal or imaginary numbers. x^4 + 20x^2 -44=0
*January 31, 2012 by Chelsea*

**Quadratic equations**

x^2 + 2x + 2 = 0 The answer has an imaginary number in it which we're supposed to solve for, but I'm having trouble with it. Thanks for any help!
*September 9, 2008 by Lucy*

**3rd grade**

Elocution on topic 'An imaginary trip to the moon' Where I can find the same?
*October 8, 2010 by Aditi*

**algebra**

1)Use synthetic subsitution to find f(-3)for f(x)=x^4-4x^3+2x^2-4x+6 answer= -15 2)One factor of x^3+2x^2-11x-12 is x+4. find the remaining factors answer= x-1;x-3 3)Which describes the number and type of roots of the equation x^3+121x=0 answer= 1 real root,two imaginary roots...
*August 17, 2007 by Marissa*

**Math**

State the number of positive real zeros, negative real zeros, and imaginary zeros for g(x)= 9x^3 - 7x^2 + 10x - 4. The only thing I know is that there are 3 sign changes.
*March 3, 2008 by Jon*

**math**

The function f(x)=x4−15x3+81x2−201x+182 has four complex roots, one of which is 3−2i. What is the sum of all real and imaginary coefficients of these roots?
*April 16, 2013 by ayan*

**science**

What imaginary line encircling the Earth is 90 degrees from both poles at every point ?
*May 22, 2008 by amatullah*

**algebra**

Find all real or imaginary solutions to equation. Use the method of your choice. 3v^2+4u-1=0
*July 20, 2009 by Jessica*

**2nd grade**

I want some help writing about an imaginary trip to the moon, what i heard and touched
*May 13, 2010 by anghel*

**probability**

how many different 10-letter words (real or imaginary) can be formed from the letters in the word MONOCHROME?
*July 27, 2010 by sha*

**World Geography**

The Prime Meridian and other imaginary north-south lines measure
*May 20, 2013 by Anonymous*

**Algebra II**

State the possible number of imaginary zeros of g(x)= x4 + 3x3 + 7x2 - 6x - 13. I came up with the answer of 2,4 or 0. Is this correct? Thanks for your help.
*February 17, 2008 by Lucy*

**algebra**

Find all real or imaginary solutions to equation. Use the method of your choice. w^2=-225
*July 20, 2009 by Jessica*

**Algebra**

Find all real or imaginary solutions to equation. Use the method of your choice. 3v^2+4u-1=0 reposting for help
*July 21, 2009 by Jessica*

**alg2/trig**

what is the smallest value of k that would make the roots of the equation x^2-2x-k imaginary? please help, no idea how to do this.
*January 23, 2012 by lisa*

**trig**

use the discriminant to solve for the smallest value of b that would make the roots of the equation x^2+bx+5=o imaginary
*February 2, 2012 by jessica*

**Maths**

Suppose Z=a+bi , where a and b are integers and i is the imaginary unit. We are given that |1+iZ| = |1-iZ| and |Z-(13+15i)|<17 . Find the largest possible value of a+b
*April 2, 2013 by Mary*

**Algebra II**

Write a quartic funciton that has 2 real and 2 imaginary roots and rewrite the polynomialin standard form.
*April 5, 2013 by Piggy*

**pre calc**

Is there any complex numer that is equal to its conjugate? a+bi=a-bi????? precalc 11th grade a+bi=a-bi ---> 2 bi = 0 ---> b = 0 So, the imaginary part has to be zero.
*November 16, 2006 by bill*

**complex numbers and imaginary units**

2i/1+i your question probably says 'simplify' multiply top and bottom by (1-i)\(1-i) and remember that i^2 =-1 so... 2i/(1+i) * (1-i)\(1-i) = (2i - 2i^2)/(1-i^2) = 2(i-i^2)/(1+1) =i+1
*May 23, 2007 by candace*

**pre-calculus**

Find the real and imaginary zeros for the following polynomial function. T(b)= 147b^3-35b^2-19b+3
*March 6, 2014 by Christina*

** math**

What is the imaginary part of −169−−−−√?
*March 21, 2013 by ayan*

**Math Analysis**

Tell if the function is symmetric with respect to the x-axis, y-axis, and origin. 3. 8x^2 - 2y^2 = 12 ==> I got that it was symmetric to both the x- and y-axes. Is this right? 4. 5x^2 - 3y^2 = 18 ==> I can't get anywhere with this equation -- I'm getting the answer that ...
*October 19, 2009 by Emily*

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