\(\Delta=\left(2m-1\right)^2-4\left(m^2-2\right)=-4m+9\ge0\Rightarrow m\le\frac{9}{4}\)
Theo Viet: \(\left\{{}\begin{matrix}x_1+x_2=2m-1\\x_1x_2=m^2-2\end{matrix}\right.\)
\(x_1x_2=2\left(x_1+x_2\right)\)
\(\Leftrightarrow m^2-2=2\left(2m-1\right)\)
\(\Leftrightarrow m^2-4m=0\Rightarrow\left[{}\begin{matrix}m=0\\m=4\left(l\right)\end{matrix}\right.\)