Hi, I'm working on this problem and I'm stuck on this integral: -7x/(x^4 + 6x^2 + 25). Since the polynomial in the denominator has no real roots, I was wondering how would you separate the denominator into different parts for PFD. Thanks.

- Martingale
**Posts:**333**Joined:**Mon Mar 30, 2009 1:30 pm**Location:**USA-
**Contact:**

Just factor like normalHi, I'm working on this problem and I'm stuck on this integral: -7x/(x^4 + 6x^2 + 25). Since the polynomial in the denominator has no real roots, I was wondering how would you separate the denominator into different parts for PFD. Thanks.

since it has no roots there can't be any linear factors...look for two quadratic ones...