Evaluate the integral $$\int {\frac{3}{x^2-2x}}\, dx$$ by completing the square and using the formula $$\int {\frac{1}{x^2-a^2}}\, dx = \frac{1}{2a}\ln\left|\frac{x-a}{x+a}\right|+C.$$

Note: Use an upper-case "C" for the constant of integration.