$$-x^3+136x^2-855x+11160 = 0$$
Answer
$$ \begin{matrix}x_1 = 130.08695 & x_2 = 2.95653+8.77768i & x_3 = 2.95653-8.77768i \end{matrix} $$
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