Find roots of polynomial $$ p(x) = x^4-16x^3+123x^2+80x-640 $$
Answer
The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 2.2361\\[1 em]x_2 &= -2.2361\\[1 em]x_3 &= 8+8i\\[1 em]x_4 &= 8-8i \end{aligned} $$Explanation
Polynomial $ x^4-16x^3+123x^2+80x-640 $ has no rational roots that can be found using Rational Root Test, so the roots were found using quartic formulas.
This page was created using
Polynomial Roots Calculator