1. ## evaluating an integral

I'm trying to evaluate

and I keep getting

. Paul's Notes says the correct answer is (11/36)e^12 + (7/36)e^(-6) but I can't seem to get that answer.

I keep getting which simplifies to the same answer above.

Can anyone tell me where I'm going wrong? thanks much

3. ## Re: evaluating an integral

thanks I was missing an x!