Hi, I think this should be fairly basic for you guys(/girls?).

By using the substitution (a) u=2x+7 and (b) u^2=2x+7 find the indefinite integral of x(2x+7)^1/2 dx. I'm fine with the process of finding (a) but there is no examples in the text book for finding (b), so I don't understand what it wants me to do? There is only a single answer in the back of the book, not an answer for (a) and (b). What the? And thank you in advance for your time.