Question

(X-1/5)^2=4/25

Answer 1

Ta có : \(\left(x-\dfrac{1}{5}\right)^2=\dfrac{4}{25}\)

\(\Rightarrow\left[{}\begin{matrix}x-\dfrac{1}{5}=\dfrac{2}{5}\\x-\dfrac{1}{5}=-\dfrac{2}{5}\end{matrix}\right.\)

\(\Rightarrow\left[{}\begin{matrix}x=\dfrac{3}{5}\\x=-\dfrac{1}{5}\end{matrix}\right.\)

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Answer 2

`(x-1/5)^2=4/25`

`<=>` \(\left[ \begin{array}{l}x-\dfrac15=\dfrac25\\x-\dfrac15=-\dfrac25\end{array} \right.\) 

`<=>` \(\left[ \begin{array}{l}x=\dfrac35\\x=-\dfrac15\end{array} \right.\) 

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