Following getting the constants A and B It is somewhat basic to compute the integral ##int frac dx x^2 + 9 ## as it might now be prepared as two less difficult integrals. I tried but I can't see how ##A,B## are constants? This is certainly supported by a nicely-properly https://gabletoppak.com/how-telanganas-amrabad-tiger-reserve-fights-back-against-its-biggest-threat-plastic/