Question

Need some help with this matrices question
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Answer 1

4. D

5. D

Explanation:

To subtract Matrices, subtract the numbers that are in the same position.

You can only add or subtract Matrices that have the same order.

Here, both Matrix X and Y, are 2 by 2 matrices.

So let's subtract

`5 - 6 = - 1`

`- 4 - ( - 1) = - 3`

`3 - ( - 7) = 10`

`- 2 - 4 = - 6`

The Matrix that matches that is D so the answer to 4 is D.

5. We do the same thing above, but we multiply by 2 first.

`5 - 2(6 ) = - 7`

`- 4 - 2( - 1) = - 2`

`3 - 2( - 7) = 17`

`- 2 - 2( 4) = - 10`

The answer here is D as well.