integral of (x^2+9)^-3 with respect to x?

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BRO. the answer is a bit critical what i can help you out is by telling you a way to solve the ques. what you need to do is to use a formula i.e. ( U.V ) or U x ∫ V d dx - ∫ ( U d x V ) dx dx dx where U is your actual question and V is 1

= x(x^2+15)/[216(x^2+9)^2] + (1/648)tan^-1 (x/3) + C