$$2x^3+x^2-x = 0$$
Answer
$$ \begin{matrix}x_1 = 0 & x_2 = -1 & x_3 = \dfrac{ 1 }{ 2 } \end{matrix} $$
Explanation
In order to solve $ \color{blue}{ 2x^{3}+x^{2}-x = 0 } $, first we need to factor our $ x $.
$$ 2x^{3}+x^{2}-x = x \left( 2x^{2}+x-1 \right) $$$ x = 0 $ is a root of multiplicity $ 1 $.
The remaining roots can be found by solving equation $ 2x^{2}+x-1 = 0$.
$ 2x^{2}+x-1 = 0 $ is a quadratic equation.
You can use step-by-step quadratic equation solver to see a detailed explanation on how to solve this equation.
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