here's the problem, i am supposed to take the integral from 1 to 2 of this:(adsbygoogle = window.adsbygoogle || []).push({});

(dx)/[(X+3)^2 (x+1)^2]

I decided that the easiest way to compute it is by integrating by partial fractions so what i did was set up the equation:

A/(x+3) + B/[(x+3)^2] + C/(x+1) + D/[(X+1)^2] = 1

After this I multiplied by the common denominator and got:

[A(x+3)(x+1)^2] + [B(x+1)^2] + [C(x+1)(x+3)^2] + [D(x+3)^2] = 1

This is where I am stuck. I can get the values of coefficients B and D by pluggin in x=-3 and x=-1 respectively by I don't know how to find coefficients A and B. I tried multiplying everything out but that just made things more complicated and confusing.

Anyone kind enough to help me out?

Thanks!

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# Homework Help: Integrating through partial fractions

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