/x/ = 325
\(\Rightarrow\left[{}\begin{matrix}x=325\\x=-325\end{matrix}\right.\)
Vậy x = 325 hoặc x = -325
\(\left|x\right|=325\)
\(\Rightarrow\) \(x\in\left\{325;-325\right\}\)
Vậy \(x\in\left\{325;-325\right\}\).
\(|x|=325\)
\(\Rightarrow\left[{}\begin{matrix}x=325\\x=-325\end{matrix}\right.\)
Vậy \(x=\left\{325;-325\right\}\)