( x - 2 ) . ( 2x - 1 ) = 0
<=> \(\left[ \begin{array}{l}x-2=0\\2x-1=0\end{array} \right.\)
<=> \(\left[ \begin{array}{l}x=2\\2x=1\end{array} \right.\)
<=> \(\left[ \begin{array}{l}x=2\\x=\frac{1}{2}\end{array} \right.\)
Vậy x = 2 hoặc x = $\frac{1}{2}$ .