$$A \times B A \left( \begin{array} { l l } { - 1 } & { 0 } \\ { 3 } & { 4 } \end{array} \right) , B \left( \begin{array} { l l } { - 2 } & { 1 } \\ { - 1 } & { 0 } \end{array} \right)$$
$\left(\begin{matrix}-BA^{2}&0\\3BA^{2}&4BA^{2}\end{matrix}\right),\left(\begin{matrix}-2B&B\\-B&0\end{matrix}\right)$
