Question

x^2-x=0

Answer 1

\(x^2-x=0\Rightarrow x^2=x\)

\(\Rightarrow x=\left\{1;0\right\}\)

Answer 2

\(x^2-x=0\)

\(\Leftrightarrow x\left(x-1\right)=0\)

\(\Leftrightarrow\left[\begin{array}{nghiempt}x=0\\x-1=0\end{array}\right.\) \(\Leftrightarrow\left[\begin{array}{nghiempt}x=0\\x=1\end{array}\right.\)