Immediately after getting the constants A and B It is really reasonably very simple to compute the integral ##int frac dx x^two + nine ## as it could now be written as two less difficult integrals. I attempted but I are not able to see how ##A,B## are constants? The https://gabletoppak.com/from-plastic-bottles-to-gabletop-cartons-a-step-toward-solving-the-plastic-pollution-crisis/