Reading an article online I came across this integral I've been trying to solve since yesterday morning and I literally tried every integration method I know and I still can't solve it. I am a beginner to integrals so help will be appreciated!
I tried substitution, integration by parts and I can't seem to find the correct way!
$$\int \:\frac{dx}{x+\sqrt{9x^2-9x+2}}$$
Does anyone know how to proceed from here? What to do? Because I am clueless. Thanks!