What are the steps required to solve the following?
I'm not looking for anyone to do my homework. I usually have no problem figuring these things out -- using Wolfram Alpha step-by-step if absolutely necessary -- but for some reason this seemingly simple problem has me stumped.
Below are the Wolfram Alpha step-by-step instructions for doing this. I get lost on the part where they do the u substitutions.
Any help is greatly appreciated.