Questions on Algebra: Complex Numbers answered by real tutors!

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 Algebra: Complex Numbers Solvers Lessons Answers archive Quiz In Depth

 Question 518014: Please help me with this problem: (4i)/(3+i) So far, I've got: [(4i)/(3+i)] * (3-i) = (12i-4i^2)/(9-i^2) I know that having i^2 = -1 but I was wondering if since it's already -4i^2 does that make it +4 or does it stay -4? Thanks for your help. It is much appreciated. Click here to see answer by MathLover1(6634)
 Question 518014: Please help me with this problem: (4i)/(3+i) So far, I've got: [(4i)/(3+i)] * (3-i) = (12i-4i^2)/(9-i^2) I know that having i^2 = -1 but I was wondering if since it's already -4i^2 does that make it +4 or does it stay -4? Thanks for your help. It is much appreciated. Click here to see answer by Alan3354(30993)

 Question 518967: find the value of m and n that make the equation true. (6-m)+3ni=-12+27i Click here to see answer by stanbon(57377)

 Question 519337: find the polar of square root of 3- square root of 3i thank you, Click here to see answer by Edwin McCravy(8909)

 Question 519856: I need help with simplifying this problem i^23? Click here to see answer by jim_thompson5910(28595)

 Question 519977: The altitude of a triangle us 4.8 meters. Find the length of the base of the triangle if the area is 8.4 square meters Click here to see answer by nerdybill(6962)

 Question 519980: The altitude of a triangle us 4.8 meters. Find the length of the base of the triangle if the area is 8.4 square meters Click here to see answer by nerdybill(6962)
 Question 519980: The altitude of a triangle us 4.8 meters. Find the length of the base of the triangle if the area is 8.4 square meters Click here to see answer by Maths68(1474)

 Question 520018: The attendance at a moving picture theater on a certain day was 737 persons. If there were 289 more adults than children, how children were there? Click here to see answer by Maths68(1474)

 Question 520002: 1)consider the polynomial p(x)=x^3+ax^2+bx-12 given that (x+3)and (x-4)are factors of p(x), factorise p(x)completely. 2)the polynomial p(x)=2x^3-ax^2=bx+48 has (x-4) as a repeated factor,find the values of a and b. Click here to see answer by Edwin McCravy(8909)

 Question 520308: Let x and y equal real numbers; (x+3yi)-(9-25i)=-5+4i solve for x and y Click here to see answer by solver91311(16897)
 Question 520308: Let x and y equal real numbers; (x+3yi)-(9-25i)=-5+4i solve for x and y Click here to see answer by stanbon(57377)

 Question 521317: I need to factor (3/(5-11i)) But I can not figure it out Click here to see answer by mananth(12270)

 Question 521802: I'm working on Adv. Alegbra II homework. I've done all of the problums exept for "Solving each Equation" questions; There are three equations that i don't understand how to solve. They are the following: (#1) -6x^2-30=0 (#2) 3x^2+18=0 (#3) 2/3x^2+30=0 If you could help ASAP that would be awesome. :) Click here to see answer by umnikmo(75)

 Question 523015: find the value of | 40 + 9i |. a 40 + 9i b 40 - 9i c -40 - 9i d -40 + 9i e not given Click here to see answer by stanbon(57377)

 Question 524821: c6-sqrt(-81) these are the 2 problems im having trouble with Click here to see answer by mananth(12270)

 Question 525487: express in terms of i, what is the square root of -15 Click here to see answer by jim_thompson5910(28595)

 Question 526154: (5 + 5i ) (7 + 6i ) Click here to see answer by stanbon(57377)

 Question 526130: if x = y^2 and y = x^2, what is the least possible real value of x^2 + x + 1, where x and y are complex numbers ? Click here to see answer by richard1234(5390)

 Question 526662: please help me urgently.... 1)Find m and n if (x-2) and (x+3) are both factors of x^3+mx^2-nx-6 2) When p(x)=x^4-3x^3+ax^2+bx-6 is divided by (x+1)it has a remainder of 8. If (x-3) is a factor of p(x) find a and b. 3) If x^2-4 is a factor of 2x^3-ax^2+bx+4 find a and b. Click here to see answer by KMST(1869)

 Question 526946: Find the absolute value of the complex number. |-10-5i| <---how do i do this?! Click here to see answer by jim_thompson5910(28595)

 Question 528100: Divide: 5 + 3i ------- 6 - 2i Click here to see answer by Edwin McCravy(8909)

 Question 528651: 1/a - 1/b = 1/c solve for b Click here to see answer by Maths68(1474)

 Question 529034: Multiply 2x-4 * x^2 - x - 1 Click here to see answer by stanbon(57377)