After finding the constants A and B It is comparatively basic to compute the integral ##int frac dx x^2 + 9 ## as it could now be created as two easier integrals. I attempted but I are not able to see how ##A,B## are constants? Available in three regular dimensions https://gabletoppak.com/glass-bottles-for-beer-soda-and-even-water-found-to-contain-toxic-levels-of-cancer-linked-microplastics-than-plastic-bottles-study-says/