$\"\"$

The matrices are $\"\"$ .

The above two matrices have same dimensions, $\"\"$ ; they can be added together.

Add matrices by adding the corresponding elements of the matrices.

The sum of matrices $\"\"$ is $\"\"$ .

$\"\"$

The product of two different signs is negative and same signs is positive.

$\"\"$

$\"\"$ $\"\"$

The value of $\"\"$ .