Completing the square,
This is actually a definite integral, but I'd like to make sure that I have the antiderivative done correctly, since that is most likely where I have screwed up. Does anybody see any mistakes here?
OK. I see what you are doing, but I'm still stuck. Focusing on the 2nd substitution, I get this:
But then I don't know what to do. This looks like a tangent integral, but I am used to either a constant in the numerator or the denominator being inside of a square root. I don't know how to handle this.
Can you help me further please. I appreciate it. Thanks.