$\"\"$

If the inverse of $\"\"$ exists, then $\"\"$ .

Multiply each side by $\"\"$ .

$\"\"$ .

The value of $\"\"$ .

$\"\"$ .

Apply identity property of matrix: $\"\"$ .

$\"\"$ .

If the inverse of $\"\"$ does not exist, then $\"\"$ is singular and it is not possible to multiply $\"\"$ by its inverse to give the identity invergse and $\"\"$ has no solution.

$\"\"$

If the invergse of $\"\"$ does not exist, then $\"\"$ is singular and it is not possible to multiply $\"\"$ by its inverse to give the identity inverse and $\"\"$ has no solution.