\(\left(3-2x\right)+x=x^2+3\)
\(\Leftrightarrow x^2+x=0\)
\(\Leftrightarrow x\left(x+1\right)=0\)
\(\Leftrightarrow\)\(\left[{}\begin{matrix}x=0\\x=-1\end{matrix}\right.\)( thỏa mãn điều kiện)
Vậy \(\left[{}\begin{matrix}x=0\\x=-1\end{matrix}\right.\)