\(2.\left(x-\dfrac{1}{2}\right)^2=\dfrac{25}{8}\)
\(\left(x-\dfrac{1}{2}\right)^2=\dfrac{25}{8}:2\)
\(\left(x-\dfrac{1}{2}\right)^2=\dfrac{25}{8}.\dfrac{1}{2}\)
\(\left(x-\dfrac{1}{2}\right)^2=\dfrac{25}{16}\)
\(\left(x-\dfrac{1}{2}\right)^2=\left(\dfrac{5}{4}\right)^2\)
\(x-\dfrac{1}{2}=\dfrac{5}{4}\) hoặc \(x-\dfrac{1}{2}=-\dfrac{5}{4}\)
\(x=\dfrac{5}{4}+\dfrac{1}{2}\) \(x=\dfrac{-5}{4}+\dfrac{1}{2}\)
\(x=\dfrac{5}{4}+\dfrac{2}{4}\) \(x=\dfrac{-5}{4}+\dfrac{2}{4}\)
\(x=\dfrac{7}{4}\) \(x=\dfrac{-3}{4}\)
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