My table of Integrals has the general scenario ##int frac dx x^2+a^two ## as a 'standard' integral too, not merely the case where ##a=1##. But I think this currently being a Calculus homework issue it is expected of your OP to figure out how to get it done. Hints got https://gabletoppak.com/sustainable-liquid-soap-packaging-why-gabletop-cartons-are-the-eco-friendly-choice/