$\"\"$

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The expression is $\"\"$ .

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$\"\"$ (Original expression)

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$\"\"$ (Multiply and divide by the conjugate of $\"\"$ )

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$\"\"$ (Apply distributive property: $\"\"$ )

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Product of sum and difference property: $\"\"$ .

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$\"\"$

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$\"\"$ (Evaluate powers: $\"\"$ and $\"\"$ )

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

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$\"\"$ (Take out common factor)

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$\"\"$ (Simplify) \ \

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$\"\"$ .

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Therefore, the simplified expression is $\"\"$ . $\"\"$

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$\"\"$ .