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.
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:
$\displaystyle \frac{y^2 - 1}{y^2 - y - 2} = \frac{(y + 1)(y - 1)}{(y + 1)(y - 2)}$
Cancelling the common y + 1 gives:
$\displaystyle = \frac{y - 1}{y - 2};~y \neq -1$
(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