# Math Help - How do you get from one stage to the other.

1. ## How do you get from one stage to the other.

I've always been useless with logs, help please! How did they get from line one to line two?

$-\dfrac14\left(\dfrac1{x+1}+\dfrac1{x-1}\right) = -\dfrac14\left(\dfrac{x-1 + x+1}{(x+1)(x-1)}\right) = -\dfrac14\left(\dfrac{2x}{x^2-1}\right) = -\dfrac12\left(\dfrac{x}{x^2-1}\right)$