Just after acquiring the constants A and B It truly is relatively basic to compute the integral ##int frac dx x^two + 9 ## as it might now be created as two less complicated integrals. I attempted but I can't see how ##A,B## are constants? The size of the box https://gabletoppak.com/why-gable-top-cartons-are-making-a-splash-in-the-water-industry/