My table of Integrals has the final circumstance ##int frac dx x^two+a^2 ## like a 'normal' integral also, not only the case where by ##a=one##. But I feel this getting a Calculus homework problem it is predicted of your OP to determine how to do it. Hints got earlier mentioned. https://gabletoppak.com/best-alternatives-to-plastic-water-bottles-in-kerala-for-a-greener-future/