# Calc/integra q

1. Sep 25, 2005

calc/integral question

having trouble with this question
int[1/((x^2+4)^2)
and i make a trig substitution x=2tan(u)
and it seems to get harder with that but its suppose to be it..

Last edited: Sep 25, 2005
2. Sep 25, 2005

### Tzar

Have you tried partial fractions?

3. Sep 25, 2005

i got this from a partital fraction... and the denominator cant be factored so i cant do that again. so a trig substitituition would be best?especially x=2tan (u)

4. Sep 25, 2005

help anyone?