Find roots of polynomial $$ p(x) = x^4+2x^3-20x^2-18x+72 $$
Answer
The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= 1.7365\\[1 em]x_2 &= -2.4967\\[1 em]x_3 &= 3.5022\\[1 em]x_4 &= -4.7419 \end{aligned} $$Explanation
Polynomial $ x^4+2x^3-20x^2-18x+72 $ 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