Simplifying a rational expression by factoring out a binomial

The video tutorial explains why direct simplification of division is not possible due to subtraction. It introduces the concept of factoring out the denominator to simplify expressions. The process involves factoring a common factor from the denominator, leading to a multiplication that can be simplified. The final result is a simplified expression.

What cannot be done with the division as mentioned in the text?

Explain the importance of multiplication in the simplification process described.