$$ \begin{aligned} 2 \cdot \frac{x^3}{x} &= 0&& \text{multiply ALL terms by } \color{blue}{ x }. \\[1 em]x\cdot2 \cdot \frac{x^3}{x} &= x\cdot0&& \text{cancel out the denominators} \\[1 em]2x &= 0&& \text{ divide both sides by $ 2 $ } \\[1 em]x &= \frac{0}{2}&& \\[1 em]x &= 0&& \\[1 em] \end{aligned} $$
This page was created using
Polynomial Equations Solver