# How do you simplify #\frac { x ^ { 2} - 2x - 15} { x ^ { 2} - 9} \cdot \frac { x + 3} { x - 5}#?

##### 2 Answers

Oct 20, 2016

#### Explanation:

Factor the fraction on the left

What are the factors of -15 that add up to -2

Difference of perfect squares

Rewrite the expression using the factors you just found

Now cross cancel

You are then left with

Oct 20, 2016

The expression can be simplified to

#### Explanation:

Hopefully this helps!