I am working on a physics problem that requires solving the following integral:
$$\int \frac{\ln(r^2+R^2+2rRu)\,du}{(r^2+R^2+2rRu)^{\frac{1}{2}}}$$
However, I don't know how to approach it, as it is unlike any I have seen before. I suspect that maybe the correct variable change will help me find it in an integral table, but I'm not sure.