I then plugged x in for x and U in the appropriate place so I had
(2(u^2-3)-1)/U du
I have tried everything.. and nothing works.. please help. Thank You
Your substitution doesn't work because du is too messy. If you let u=x+3 then x=u-3 and du=dx. So this integral becomes . Break this up into two terms and use the power rule.
No, I just substitued U in to the equation in my last post.. and its no where close to a resemblence of the answer. is what you have posted correct? Because thats not what I have for the answer. The solution I have is (2/3)(sqrt (x+3))(2x-15)
Oh, well looking at your post again.. yes that is what I got for the integrals once i separted them..
The final answer completely simplified is what you wrote earlier. I'm trying but can't get it into that form. The method I suggested so far should be right though.