Simplify by rationalizing the denominator.

Given,

Need to simplify by rationalizing denominator

⇒ To rationalize the denominator of we must multiply the number with its denominator as follows

⇒ ×

=

⇒ we know that numerator is in the form of (a+b)² = a²+2ab+b²

⇒ we know the denominator is in the form of a²–b² = (a+b)(a–b)

=

=

=

=

Hence, is simplified by rationalizing denominator as