\(\Leftrightarrow2x^3-3x^2+6x+2x^2-3x+6=0\)
\(\Leftrightarrow x\left(2x^2-3x+6\right)+2x^2-3x+6=0\)
\(\Leftrightarrow\left(x+1\right)\left(2x^2-3x+6\right)=0\)
\(\Leftrightarrow\left[{}\begin{matrix}x=-1\\2x^2-3x+6=0\left(vn\right)\end{matrix}\right.\)