$\"\"$

The expression is $\"\"$ .

Using the conjugates to rationalize a denominator.

$\"\"$ ; The conjugate of $\"\"$ is $\"\"$ .

$\"\"$

(Apply product of sum and difference property: $\"\"$ )

$\"\"$

(Evaluate powers: $\"\"$ )

$\"\"$

$\"\"$ (Subtract: $\"\"$ )

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

The simplified expression is $\"\"$ .