9x(X-1)^2-4/9:2/9=1/4

Đáp án:

Giải thích các bước giải:

 $9.(x-1)^{2}-\dfrac{4}{9}:\dfrac{2}{9}=\dfrac{1}{4}$

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$⇔9(x-1)^{2}=\dfrac{9}{4}$

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$⇔(x-1)^{2}=\dfrac{1}{4}$

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$\(\left[ \begin{array}{l}x-1=\dfrac{1}{2}\\x-1=\dfrac{-1}{2}\end{array} \right.\)⇔\(\left[ \begin{array}{l}x=\dfrac{3}{2}\\x=\dfrac{1}{2}\end{array} \right.\) $