Soon after discovering the constants A and B It really is fairly straightforward to compute the integral ##int frac dx x^2 + 9 ## as it might now be prepared as two less complicated integrals. I tried but I simply cannot see how ##A,B## are constants? This is often supported https://gabletoppak.com/sustainable-liquid-soap-packaging-why-gabletop-cartons-are-the-eco-friendly-choice/