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If A = | a b | B= | e f |

| c d | | g h|

Then A + B = | a + e b + f |

| c + g d + h|

And A – B = | a – e b – f|

| c – g d – h|

| 3 4 | | 8 7|

Find A + B.

= | 1 6 | + | 2 5|

| 3 4 | | 8 7|

=| 1 + 2 6 + 5|

| 3 + 8 4 + 7|

= | 3 11|

| 11 11|

Therefore A + B = | 3 11|

| 11 11|

|1 0 | |6 7|

Find A – B.

= | 2 -5 | - | 3 2|

|1 0| |6 7|

= | 2 – 3 - 5 – 2|

| 1 – 6 0 - 7 |

= | -1 -7|

| -5 -7|

Therefore A – B = | -1 -7|

| -5 -7|