Question

x^2+2x-x+2-2=0 giúp ạ

Answer 1

\(x^2+2x-x+2-2=0\)

\(\Leftrightarrow x^2+x=0\)

\(\Leftrightarrow x\left(x+1\right)=0\)

\(\Leftrightarrow\left[{}\begin{matrix}x=0\\x+1=0\end{matrix}\right.\)

\(\Leftrightarrow\left[{}\begin{matrix}x=0\\x=-1\end{matrix}\right.\)

Answer 2

\(x^2+x=0\)
\(x\left(x+1\right)=0\)

=>x=0 hoặc (-1)