http://img.photobucket.com/albums/v295/uniqness/math.jpg [Broken](adsbygoogle = window.adsbygoogle || []).push({});

I'm having a hard time trying to figure out how the last two steps were taken to obtain the answer. I actually have an exam in couple hours and I would really appreciate if someone could explain carefully as soon as possible. Thanks in advance.

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

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Integration problem

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