Integration using completing the square and the derivative of arctan(x) | Khan Academy
All right, let’s see if we can find the indefinite integral of ( \frac{1}{5x^2 - 30x + 65} \, dx ). Pause this video and see if you can figure it out.
All right, so this is going to be an interesting one. It’ll be a little bit hairy, but we’re going to w…