Immediately after getting the constants A and B It truly is rather straightforward to compute the integral ##int frac dx x^two + 9 ## as it might now be written as two less complicated integrals. I attempted but I cannot see how ##A,B## are constants? This can be supported by https://gabletoppak.com/from-plastic-bottles-to-gabletop-cartons-a-step-toward-solving-the-plastic-pollution-crisis/