(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

how do i integrate:

(-2x)/(1+x^2)^2

2. Relevant equations

3. The attempt at a solution

I used the substitution u=1+x^2

then i got that the integral is

1/[2(1+x^2)^2 +C

but i'm not sure if that's correct

thank you

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# Homework Help: How to integrate -2x/ (1+x^2)

**Physics Forums | Science Articles, Homework Help, Discussion**