$\"\"$

The matrices are

$\"\"$ and $\"\"$ .

If $\"\"$ and $\"\"$ are inverses, then $\"\"$

Find the product $\"\"$ .

$\"\"$ (Substitute $\"\"$ and $\"\"$ )

$\"\"$ (Distibute the scalar: $\"\"$ )

$\"\"$ (Simplify)

Since $\"\"$ , they are not inverses to each other. $\"\"$

The matrices are not inverses.