Following finding the constants A and B It is really rather very simple to compute the integral ##int frac dx x^two + 9 ## as it could now be written as two easier integrals. I attempted but I are not able to see how ##A,B## are constants? The article traces https://gabletoppak.com/aseptic-tetra-pak-vs-non-aseptic-gable-top-choosing-the-right-carton-for-your-needs/