$$x^3-6x-6 = 0$$
Answer
$$ \begin{matrix}x_1 = 2.84732 & x_2 = -1.42366+0.28361i & x_3 = -1.42366-0.28361i \end{matrix} $$
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