Question

What the answer to number 7

Answer 1

Explanation:

Focus on #7. Let's combine the first two matrices inside round parentheses.

We get

-2 - 1

4 + 3

and so the original problems becomes

-3 4

3( [ ] + [ ] )

7 2

Combining the two matrices, we get the following:

1 3

3([ ]) = [ ]

9 9