Question

Need some help with this matrices question​

Answer 1

Answer:

4. D

5. D

Step-by-step 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.