Question

Tìm giá trị của x:

(2x + 18).x.(2x - 18) = 0
 

Answer 1

\(\Leftrightarrow\left[{}\begin{matrix}x=0\\2x+18=0\\2x-18=0\end{matrix}\right.\Leftrightarrow\left[{}\begin{matrix}x=0\\x=-9\\x=9\end{matrix}\right.\)

Answer 2

\(\left(2x+18\right).x.\left(2x-18\right)=0\\ \Rightarrow\left[{}\begin{matrix}2x+18=0\\x=0\\2x-18=0\end{matrix}\right.\\ \Rightarrow\left[{}\begin{matrix}x=-9\\x=0\\x=9\end{matrix}\right.\)