Factoring with the difference of two squares to simplify a rational expression

The video tutorial explains how to determine restrictions in mathematical expressions by identifying values that make the denominator zero. It discusses the importance of factoring expressions to simplify them and find these restrictions. The tutorial provides a step-by-step example, showing how to factor a difference of squares and apply restrictions to the final expression.

How does the difference of two squares apply to the example provided?

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What is the final simplified expression after applying the restrictions?

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