So:
Now use the identity:
I'd love to see various ways to solve this integral, please.
I have thought about using that
as I know that , but I'm not sure if it is OK. However, I hope someone feels like showing me various ways of doing it.
In advance, thank you for your time and help.
I have this way:
I'd like to point out that I don't usually use such a long and windy method, it's just that you wanted various ways of solving it.
I just noticed there's a typo on my image. For the second substitution it should have a -x/2m. See my last post.