Toán Lớp 8: tìm x (2x-3)^2=9 sạgkfcfxaldfsigtujfvhtbgkvsc
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Toán Lớp 8: tìm x (2x-3)^2=9 sạgkfcfxaldfsigtujfvhtbgkvsc
Comments ( 2 )
$<=>(2x-3)^2-9=0$
$<=>(2x-3-3)(2x-3+3)=0$
$<=>(2x-6).2x=0$
$<=>$\(\left[ \begin{array}{l}2x-6=0\\2x=0\end{array} \right.\) <=>\(\left[ \begin{array}{l}x=3\\x=0\end{array} \right.\)