Question
$$0 = x(x-1)$$
Answer
$$ \begin{matrix}x_1 = 0 & x_2 = 1 \\[1 em] \end{matrix} $$
Explanation
$$ \begin{aligned} 0 &= x(x-1)&& \text{simplify right side} \\[1 em]0 &= x^2-x&& \text{move all terms to the left hand side } \\[1 em]0-x^2+x &= 0&& \text{simplify left side} \\[1 em]-x^2+x &= 0&& \\[1 em] \end{aligned} $$
In order to solve $ \color{blue}{ -x^{2}+x = 0 } $, first we need to factor our $ x $.
$$ -x^{2}+x = x \left( -x+1 \right) $$$ x = 0 $ is a root of multiplicity $ 1 $.
The second root can be found by solving equation $ -x+1 = 0$.
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