# Questions on Algebra: Complex Numbers answered by real tutors!

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 Algebra: Complex Numbers Solvers Lessons Answers archive Quiz In Depth

 Question 549677: What is the proof of the quadratic formula? I have only been able to subract c and divide the equation by a? Click here to see answer by Edwin McCravy(8878)

 Question 550125: The equation x^3 +3xy + y^3 = 1 is solved in integers. Find the possible values of x - y Click here to see answer by Alan3354(30924)

 Question 550679: Simplify 2i + 5 ______ 3i - 4 to the form ai + b. Express z = -2 -5i in polar form. Express z = 3 + 5i in exponential form. Use De Moivre's Theorem to express cos4 0 as powers of cos0. Click here to see answer by Alan3354(30924)

 Question 551246: which of the following sets of numbers includes only prime numbers 47, 91 43, 79 57, 97 51, 73 3.5x10-2 Click here to see answer by richard1234(5390)

 Question 550956: here is my query... Let a(x); b(x) and c(x) be polynomials with complex coeffcients such that gcd(a(x); b(x); c(x)) = 1 (i.e. no polynomial of degree >= 1 divides all the three) and deg(a).deg(b).deg(c) =0 0. Prove that, a(x) ^n + b(x) ^n != c(x) ^n for all n >= 3 (!= => "not equal to") Click here to see answer by richard1234(5390)

 Question 552710: g(x)=2x^2-5 g(3) Do you square the 3 and then multiply by 2? Click here to see answer by jim_thompson5910(28476)

 Question 553871: what is the value of b if (4+ or - i) are complex roots of 2x squared+bx+15=0 Click here to see answer by prateekagrawal(56)

 Question 554024: express the following in the form x+iy 3+2i/2-3i Click here to see answer by Alan3354(30924)

 Question 554247: Find the maximum value of the function: -4(x-3)(x+2) Click here to see answer by stanbon(57203)

 Question 554326: how would i solve equations over complex numbers? for example, x^2-2x+2=0 Click here to see answer by jim_thompson5910(28476)

 Question 555117: I need the derivative of : y = radical((x)^2) + 1 * radical((x)^2) - 1 The answer is supposed to be y' = 2(x^3)((x^4-1)^-1/2) I want to know how to do this. Help me please. Click here to see answer by Alan3354(30924)

 Question 555114: I need the derivative of : y = e^x - e^-x The answer is supposed to be y' = e^x + e^-x Help me please. Click here to see answer by Alan3354(30924)

 Question 555646: Determine the derivative of : y = (2x + 3) / (3x + 4) Thank you Click here to see answer by Alan3354(30924)

 Question 555648: I need the derivative of : y = sqrt(x^2) + 1 * sqrt(x^2) - 1 The answer is supposed to be y' = 2(x^3)((x^4-1)^-1/2) Help me please. Click here to see answer by Alan3354(30924)

 Question 555641: Determine the derivative of : f(x)= log x^2 Thank you I want to know the method please Click here to see answer by Alan3354(30924)