$$-x^3+11x^2-31x+34 = 0$$
Answer
$$ \begin{matrix}x_1 = 7.45249 & x_2 = 1.77375+1.18997i & x_3 = 1.77375-1.18997i \end{matrix} $$
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