styles4u

Lv 4

# Simplify the rational expression:?

Simplify the rational expression:

x2 – 6x – 7

__________

x2 – 1

### 3 Answers

Relevance

- ♪♥Annie♥♪Lv 61 decade agoFavorite Answer
First: factor the numerator and denominator:

= [(x - 7)(x + 1)]/[(x + 1)(x - 1)

Second: cancel "like" terms > cancel (x+1) from the top and bottom:

= (x - 7)/(x - 1)

- Anonymous1 decade ago
x-7

------

x-1

This is the answer b/c the top factors out to (x-7)(x+1) and the bottom factors to (x+1)(x-1) and the (x+1) cancels out on the top and bottom....

go to regentsprep.com and click on math a or math b if you need help- its a good site to give you directions.

Still have questions? Get your answers by asking now.