Question

I don't understand Matrices at all, most of the questions are about adding and subtracting them

Answer 1

To add matrixes, we have to add the terms in the same column and row. As an example, we have to do it as follows:

Row 1, Column 1:

`-1+7=6`

Row 1, Column 2:

`6-11=-5`

Row 2, Column 1:

`-2+(-3)=-5`

Row 2, Column 2:

`2-1=1`

Row 3, Column 1:

`4+9=13`

Row 3, Column 2:

`9+(-3)=6`

Answer: