$$-x^3+16x^2-94x+220 = 0$$
Answer
$$ \begin{matrix}x_1 = 7.1679 & x_2 = 4.41605+3.34528i & x_3 = 4.41605-3.34528i \end{matrix} $$
Explanation
This polynomial has no rational roots that can be found using Rational Root Test.
Roots were found using qubic formulas.
This page was created using
Polynomial Equations Solver