Minh Lệ
Giới thiệu về bản thân
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2022-04-19 19:32:20
\(\left(x-\dfrac{1}{2}\right)^2=4\\ \Leftrightarrow\left[{}\begin{matrix}x-\dfrac{1}{2}=2\\x-\dfrac{1}{2}=-2\end{matrix}\right.\\ \Leftrightarrow\left[{}\begin{matrix}x=\dfrac{3}{2}\\x=-\dfrac{3}{2}\end{matrix}\right.\)
Vậy x=-3/2 hoặc x=3/2
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