My table of Integrals has the general situation ##int frac dx x^2+a^two ## to be a 'standard' integral too, not just the situation where by ##a=one##. But I believe this getting a Calculus homework issue it is expected of the OP to determine how to get it done. Hints were https://gabletoppak.com/travel-green-gabletop-paks-sustainable-shift/