$$-x^3+2x^2-5x+7 = 0$$
Answer
$$ \begin{matrix}x_1 = 1.60382 & x_2 = 0.19809+2.07975i & x_3 = 0.19809-2.07975i \end{matrix} $$
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