Question

Tìm x biết a) (x+1)^2=3(x+1)

Answer 1

\(< =>\left(x+1\right)^2-3\left(x+1\right)=0< =>\left(x+1\right)\left(x+1-3\right)=0< =>\left(x+1\right)\left(x-2\right)=0< =>\left[{}\begin{matrix}x+1=0\\x-2=0\end{matrix}\right.< =>\left[{}\begin{matrix}x=-1\\x=2\end{matrix}\right.\)