Toán Lớp 8: $3x^{2}$ -3x=$(x-1)^{2}$
tìm x
(ai làm đc mik cko 5*)
lẹ nha
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Toán Lớp 8: $3x^{2}$ -3x=$(x-1)^{2}$
tìm x
(ai làm đc mik cko 5*)
lẹ nha
Comments ( 2 )
3x(x-1)-(x-1)^2=0
(x-1)[3x-(x-1)]=0
(x-1)(3x-x+1)=0
(x-1)(2x+1)=0
<=>\(\left[ \begin{array}{l}x-1=0\\2x+1=0\end{array} \right.\)
<=>\(\left[ \begin{array}{l}x=1\\x=\frac{-1}{2}\end{array} \right.\)