Immediately after acquiring the constants A and B it's relatively basic to compute the integral ##int frac dx x^2 + 9 ## as it may possibly now be composed as two more simple integrals. I tried but I are not able to see how ##A,B## are constants? Obtainable in three https://gabletoppak.com/reducing-microplastics-why-gable-top-cartons-are-better-than-plastic-water-bottles/