Rational Integration

l46kok

1. The problem statement, all variables and given/known data
Integrate (dx)/(-4 + x^2)


2. Relevant equations

Trig substitution?????

3. The attempt at a solution

How would you integrate something like this? I don't need answers, I just need some guidelines to start off.

mjsd

note: (x^2-4) = (x-2)(x+2)
then partial factions

l46kok

(Hits head)

Engineering makes you forget the basic methods of integration.

Thanks.