\(\left(\dfrac{1}{2}+2x\right)\left(2x-3\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}\dfrac{1}{2}+2x=0\\2x-3=0\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}2x=-\dfrac{1}{2}\\2x=3\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=-\dfrac{1}{4}\\x=\dfrac{3}{2}\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}\dfrac{1}{2}+2x=0\\2x-3=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}2x=-\dfrac{1}{2}\\2x=3\end{matrix}\right.\Leftrightarrow}\left[{}\begin{matrix}x=-\dfrac{1}{4}\\x=\dfrac{3}{2}\end{matrix}\right.\)
( 1/2 + 2x ) . ( 2x - 3 ) = 0
=> 1/2 + 2x = 0 hoặc 2x - 3 = 0
+ nếu 1/2 + 2x = 0 + nếu 2x - 3 = 0
2x = 1/2 - 0 2x = 0 + 3
2x = 1/2 2x = 3
x = 1/2 : 2 x = 3 : 2
x = 1/4 x = 1,5
vậy x = 1/4 hoặc 1,5
