tolong bantu jawab soal nomer4 berserta caranya

jawab
 [tex]=\ -2 \left[\begin{array}{ccc}2&-3&1\\-4&0&4\end{array}\right] \left[\begin{array}{ccc}1&-5\\-2&4\\3&6\end{array}\right] \\ = \ -2\ \left[\begin{array}{ccc}(2+6+3)&(-10-12+6)\\(-4+0+12)&(20+0+24)\end{array}\right]\\ = \ -2\ \left[\begin{array}{ccc}11&-16\\8&44\end{array}\right]\\ = \ \left[\begin{array}{ccc}-22&32\\-16&-88\end{array}\right] [/tex]