My Table of Integrals has the general scenario ##int frac dx x^2+a^two ## like a 'typical' integral as well, not merely the case the place ##a=1##. But I do think this currently being a Calculus homework challenge it is predicted of the OP to figure out how to do it. https://gabletoppak.com/water-in-a-sustainable-box-the-future-of-eco-friendly-hydration/