$$x^3-4x^2+2x-4 = 0$$
Answer
$$ \begin{matrix}x_1 = 3.7511 & x_2 = 0.12445+1.02512i & x_3 = 0.12445-1.02512i \end{matrix} $$
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