Question

can anyone subtract x/x^2-1 - 2/x+1

Answer 1

(-x+2)/(x^2-1)

Answer 2

To start with you factor (x^2-1)
and you get (x+1) (x-1)

so it's now
x/(x+1)(x-1) - 2/(x+1)
in order to subtract these two terms they need a common denominator.

so you multiply the second expression by (x-1) to make it look like the first,

2 (x -1) = 2x -2

Now you can subtract both terms,
x - 2x +2 = -x +2

write the new term above the denominator,
(-x+2)/(x^2-1)

Answer 3

thank you that helps alot