Answer:[tex]\left[\begin{array}{ccc}-16&15\\-11&1\\15&-15&\end{array}\right][/tex]
Step-by-step explanation:
-3A + 2B
=[tex]\left[\begin{array}{ccc}-12&3\\-15&-9\\21&-15\end{array}\right][/tex] [tex]+ \left[\begin{array}{ccc}-4&12\\4&10\\-6&0\end{array}\right][/tex] [tex]=\left[\begin{array}{ccc}-16&15\\-11&1\\15&-15&\end{array}\right][/tex]
