After obtaining the constants A and B it's reasonably uncomplicated to compute the integral ##int frac dx x^2 + 9 ## as it may now be published as two less complicated integrals. I tried but I are unable to see how ##A,B## are constants? This is certainly supported by a https://gabletoppak.com/why-white-label-water-bottles-are-a-game-changer-for-your-brand/