Question

x^2+2x-3/x^2-1 ....with steps please :)

Answer 1

factorize.

Answer 2

(x-1) (x+3)
----------
(x-1) (x+1)

Answer 3

(x+3)
------
(x+1)

Answer 4

ok first step u factor the numerator and the denominator which becomes (x+3)(x-1) /(x-1)(x+1) and then simplify x-1 with x-1 so the answer is (x+3)/x+1

Answer 5

Thanks Saifoo and Aroub!

Answer 6

Uw Brian! ;)

Answer 7

anytime brian! :D

Answer 8

Actually, how do you know that \[(x ^{2}-1) \] is not written as (x-1)(x-1) but it is written as (x-1)(x+1) ?

Answer 9

YES x^2-1 is (x-1)(x+1)

Answer 10

yes i know, but why can we not write it as (x-1)(x-1)..what is the rule for it?

Answer 11

oh okay the rule is (a^2-b^2) =( a-b)(a+b)

Answer 12

oh and the sign must be negative!

Answer 13

Ohh okay that makes sense, Thanks!!

Answer 14

no prob! :)