# Thread: Simplifying algebraic fractions help!

1. ## Simplifying algebraic fractions help!

I need to simplify this fraction:

y^2 - 1
___________

y^2 - y - 2

(the line represents the fraction)

EDIT: never mind everyone ive managed to work it out. But thanks to anyone who was about to post the answer.

2. Originally Posted by nugiboy
I need to simplify this fraction:

y^2 - 1
___________

y^2 - y - 2

(the line represents the fraction)

EDIT: never mind everyone ive managed to work it out. But thanks to anyone who was about to post the answer.
Just for the sake of completeness:
$\frac{y^2 - 1}{y^2 - y - 2} = \frac{(y + 1)(y - 1)}{(y + 1)(y - 2)}$

Cancelling the common y + 1 gives:
$= \frac{y - 1}{y - 2};~y \neq -1$
(We need that last statement to remind us that y can't be -1 in the original expression, so neither can it be -1 here.)

-Dan