Where Did I Go Wrong? Evaluating an Integral Using Substitution

[odolwa99]

Hi, I'm new to integration and I'm trying to figure out where I went wrong on this question. I'm close to the answer, but I can't tell where I've gone wrong? Can anyone help?

Thanks.

Homework Statement

Q. Evaluate the following:

The Attempt at a Solution

Please see attachment.

 

[Mark44]

It might be easier to focus on the indefinite integral, and use your substitution to get an antiderivative. After that, undo your substitution. Then, evaluate your antiderivative at the two limits of integration.