SOLUTION: Find all complex roots of the polynomial x^4-8^3+11x^2+40x-80

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Find all complex roots of the polynomial x^4-8^3+11x^2+40x-80      Log On


   

Question 942109: Find all complex roots of the polynomial x^4-8^3+11x^2+40x-80
Found 2 solutions by RyuSlender, Fombitz:
Answer by RyuSlender(3) About Me  (Show Source):
You can put this solution on YOUR website!
x=4,−4.799446

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
I assume you mean,
x%5E4-8x%5E3%2B11x%5E2%2B40x-80=0
%28x-4%29%5E2%28x%5E2-5%29=0
There are no complex roots for this polynomial, they are all real.