$$x^3+x^2-x+1 = 0$$
Answer
$$ \begin{matrix}x_1 = -1.83929 & x_2 = 0.41964+0.60629i & x_3 = 0.41964-0.60629i \end{matrix} $$
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