My table of Integrals has the general situation ##int frac dx x^2+a^two ## like a 'conventional' integral as well, not only the case the place ##a=1##. But I believe this becoming a Calculus homework dilemma it is predicted on the OP to figure out how to get it done. Hints https://gabletoppak.com/kerala-get-ready-to-say-no-to-plastic-from-october-2/