Resolve into partial fractions:
x^4 / (x^2 +1)(x^2 -1)
sorry if it looks messy but im not sure how to make fractions, etc. on this forum
anyway, since its a improper fraction i got the proper fraction by long devision and ended up with :
1 + 1/ (x^2 +1)(x^2 -1)
since i cant factorize (x^2 +1) how do i continue?
do I just say A/(x^2 +1) + B/(x^2 -1) ?
If so how do i calculate values if i have B(x^2 +1) ?