Questions on Algebra: Complex Numbers answered by real tutors!

Tutors Answer Your Questions about Complex Numbers (FREE)

Question 572316: Please help me solve this equation: { { { sqrt ( z ) = (2/3-2i) + 2 + 5i } } }
Click here to see answer by ankor@dixie-net.com(22740)

Question 573035: Sorry this is calculus but I really need some help I keep on getting different answers using the different examples ive got please help me
Evaluate the definite integral (the integral symbol with 2 at the top and 1 at the bottom)3x^2-2x dx
My answers have been 0,1.5,4 and 4.5
Click here to see answer by stanbon(75887)

Question 574171: i dont know how to simplify the following :
(10+15i)-(48-30i)
and
(6-4i)(6+4i)
and
(4+3i)(2-5i)
any help plz ?
Click here to see answer by stanbon(75887)

Question 574749: (x-7)/(square root x-1) + 3(x-1)^1/2=0
What does 'x' equal?
Click here to see answer by ad_alta(240)

Question 574959: this is calculus, I need some help using the simpson rule
Consider the integral (the integral symbol with pi/2 at the top and 0 at the bottom)cosx dx
i)Using 4 intervals appoximate the integral using the Simpson's rule
ii)Determine the actual value of the definite integral
Please help me
Click here to see answer by richard1234(7193)

Question 575177: solve the equation by factoring. show work
2x^2 = 7x+15
Click here to see answer by Alan3354(69443)

Question 575604: what is the square root of -144?

Click here to see answer by mananth(16946)

Question 576796: Solve -4(2+8i) in a+bi standard form
Click here to see answer by nerdybill(7384)

Question 577123: 7-9yi = 8x +12i
Click here to see answer by Alan3354(69443)

Question 577079: Preform the indicated operation using trigonometric form. Leave answer in trigonometric form
(-3-3i)(2+2i)
Click here to see answer by Edwin McCravy(20054)

Question 577227: what is zero point repeating 6 equals to as a percent
Click here to see answer by Alan3354(69443)

Question 578509: 5x+2yi=15-14i
Click here to see answer by stanbon(75887)

Question 578453: How do I simplify (3-8i)(5+6i) in a+bi form ?
Click here to see answer by ankor@dixie-net.com(22740)

Question 578748: What is ( 7-4i/9+2i)
Click here to see answer by dfrazzetto(283)

Question 578830: what is the quotient when (2+5i) is divided by (1-i)
Click here to see answer by Tatiana_Stebko(1539)

Question 579322: sorry this is calculus, please help
Given the function f(x)=3cosx for the interval 0 i)determine the values of x for which the function is increasing
ii)find the critical points and determine their nature
iii)determine the concavity of the function, between the critical values

Click here to see answer by KMST(5328)

Question 579742: .
Click here to see answer by josmiceli(19441)

Question 581154: Please show the steps on how to solve this multiplication problem.
(3 - squarerootof-5) * (1 + squarerootof-1)
(in other words..)
quantity (three minus squareroot of negative five) multiplied by quantity (one plus squareroot of negative one)
answer is in a + bi form and is as follows...
(3 + squarerootof5) + (3 - squarerootof5)i
Thank you so much.

Click here to see answer by bucky(2189)

Question 581162: Express 4-3i/2+i in the form A+iB.
Click here to see answer by mananth(16946)

Question 581355: 1. 3i(2+5i)=x+6i
Click here to see answer by dfrazzetto(283)

Question 581384: is anyone here good at math !?!? I NEED HELP :)
Let
p(x) = x^3-3x^2-2x+1.
p(-2) can be computed via synthetic division by filling in for the letters a through g in the table

1 -3 -2 1
b d f
a c e g

where
=a,
=b,
=c,
=d,
=e,
=f,
=g.
Moreover, p(-2) = and p(x) can be written as
p(x) = (x+2)q(x) + r
where
q(x) = is a quadratic polynomial and
r= is a real number.
Click here to see answer by stanbon(75887)

Question 581638: How do you solve the problem (1-4i)/(2+3i)
i is an imaginary number (the square root of -1)
Also, how would you find the equation of a circle with a diameter AB, given that the coordinates of a and B are (-6,1) and (4,-5). What is the answer in standard form
Click here to see answer by Edwin McCravy(20054)

Question 581654: Find the equation of the circle with the diameter AB, given that the coordinates of A and B are (-6,1) and (4,-5).
The equation of the circle should be written in the form (x-h)squard + (y-k))squared =radius squared
Click here to see answer by jim_thompson5910(35256)

Question 581656: Find the equation of the circle passing through the origin and with the center (3,5)

The answer should be written in the form (x-h) squared + (y-h)squared = radius squared
Thanks!!
Click here to see answer by jim_thompson5910(35256)

Question 581657: How do you solve the inequality:
[(x+1)/(x-1)] + [(1-x)/(1+x)] is less than -1
Click here to see answer by Edwin McCravy(20054)

Question 582101: How do you solve the problem that asks: Find the equation of the circle with the diameter AB, given, that the coordinates of A and B are (-6,1) and (4,-5).
Click here to see answer by jim_thompson5910(35256)

Question 582098: how do you solve: (1-4i)/(2+3i)

i indicates a number that is imaginary ( sqrt of -1)

thanks so much
Click here to see answer by Alan3354(69443)

Question 582164: what is the answer to a^2+16a+15?
Click here to see answer by josmiceli(19441)

Question 582408: How do I solve problems like 10+5i/10-5i? I thought I just needed to multiply the top by the bottom, but I keep coming up with the worng answer.
Click here to see answer by Alan3354(69443)

Question 583093: x^2=-4-11
Click here to see answer by Jeff Dunham(2)

Question 583593: (3+7i)(5-2i)=
explain this equation please
Click here to see answer by JBarnum(2146)

Question 583804: how do you expand this complex number in a standard complex number format?
(1/2-1/2i)^4
Click here to see answer by jim_thompson5910(35256)

Question 583804: how do you expand this complex number in a standard complex number format?
(1/2-1/2i)^4
Click here to see answer by solver91311(24713)

Question 584346: (-1+3i)divided by (1+i)
Click here to see answer by solver91311(24713)

Question 585258: For the function f(x,y)=x^2+2y^2, find
f(x+h,y)- f(x,y)/ (h)
The answer is 2x+h, how do I get this.
Thank You
Click here to see answer by jim_thompson5910(35256)

Question 585798: When simplifying expressions that involve complex numbers, How do I determine what the values of the numbers will be?
I need help with solving expressions containing these.
Ex:
(4-5i) (1-i)
(3-4i)/(4-3i)
Click here to see answer by josmiceli(19441)

Question 585882: solve the equation for x and express the roots in simplest a+ bi form: 3x^2=2x-1

Click here to see answer by jim_thompson5910(35256)

Question 586692: x=(-1/2+(root 3)/2 i))^5 + (-1/2-(root 3)/2 i))^5
Click here to see answer by ad_alta(240)

Question 587131: 2x + 3> 13
Click here to see answer by xdragonfight(116)

Question 589115: Find a polynomial f(x)of degree 3 that has the indicated zeros and satisfies the given condition.
-2i,2i,3; f(1)=20
(I get scared when I see imaginary numbers, because i have no clue what to do with them.)
Click here to see answer by josmiceli(19441)

Question 590142:
Click here to see answer by edjones(8007)

Question 590741: (2-i) squared
Click here to see answer by richwmiller(17219)

Question 590894: I don't understand this question. How do you solve it? simplify f(x) = the quantity 2 x-squared plus 3x plus 1 all over 2x plus 1. Using complete sentences, explain why f(1) = 2, f(0) = 1, and f(-1) = 0, yet f(-one�Chalf) is undefined. Make sure to show your work.
Click here to see answer by ad_alta(240)

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