Algebra-1

Question Analysis
This question tests the student's ability to simplify a rational expression involving a difference of squares, which is a more advanced skill in dividing functions.

Key Concept Explanation
When simplifying a rational expression, recognize and factor the difference of squares in the numerator. Then, cancel out any common factors. The domain of the resulting function must exclude values that make the denominator zero.

Step-by-step Solution
1. Start with the expression:
2. Recognize that the numerator is a difference of squares: