How would I begin to solve this integrand ? by completing the square ?

I try completing the square when I factor out a - 4 outside the square root but it does not work out quite right.

$\displaystyle \int{\frac{1}{\sqrt{-4x^2+12x-4}}}$

This one is just a tad confusing to me when trying to complete the square, which I would assume would be the best way to do this.