Answer:
1. [tex]\left[\begin{array}{ccc}-3&-8\\6&3\\2&8\end{array}\right][/tex] , 2. [tex]\left[\begin{array}{ccc}-8&-4&21\\-8&6&7\end{array}\right][/tex]
Step-by-step explanation
1. [tex]\left[\begin{array}{ccc}4&-3\\0&-1\\5&8\end{array}\right] - \left[\begin{array}{ccc}7&5\\-6&-4\\3&0\end{array}\right][/tex]
To solve just that each in the first matrix block and substract with their equivalent in the second matrix block.
For example 4 -7 = -3, -3-5= -8
[tex]\left[\begin{array}{ccc}-3&-8\\6&3\\2&8\end{array}\right][/tex]
2. [tex]-2\left[\begin{array}{ccc}10&2&-3\\1&6&-5\end{array}\right] + 3\left[\begin{array}{ccc}4&0&5\\-2&6&-1\end{array}\right][/tex]
Multiply first block with -2 and the second block by 3
[tex]\left[\begin{array}{ccc}-20&-4&6\\-2&-12&10\end{array}\right] + \left[\begin{array}{ccc}12&0&15\\-6&18&-3\end{array}\right][/tex]
Add just the same as question 1
[tex]\left[\begin{array}{ccc}-8&-4&21\\-8&6&7\end{array}\right][/tex]
