integrate e^(2x) / (e^(4x) + 9)

Question

am I allowed to simplify the e^(2x) with the e^(4x)?

Thank you

Answer 1

yes. let u = e^2x
Then du = 2e^2x dx and you have 1/(u^2+9) du/2

And proceed from there

Answer 2

thanks steve!