The expression is
.
Using the conjugates to Rationalize a denominator.
\
; The conjugate of
is
.


Apply product of sum and defference property:
.

Evaluate powers:
.
(Subtract:
)
(Rewrite:
)
Distribute terms using distributive property:
.

(Simplify)
Rewrite the expression using product property of square roots;
\For nonnegative real numbers a and b,
.
(Multiply:
)
(Apply standard division form:
)
(Cancel common terms)
The simplified expression is
.