Just After acquiring the constants A and B It really is comparatively straightforward to compute the integral ##int frac dx x^two + 9 ## as it can now be composed as two more simple integrals. I tried but I are not able to see how ##A,B## are constants? In summary, https://gabletoppak.com/why-every-home-should-use-long-lasting-oil-storage-cartons-for-daily-cooking/