I need help factoring this trinomial:

12x^2 -88x+112 =0

I tried using the quadratic formula and getting:

x=90.02758... or 85.9724.... which both don't make any sense whatsoever. I think I am making mistakes simplifying the quadratic formula. I get to [88 +/- sqrt(2368)]/24

What next?

my course is saying the factors are:

x=5.694 or 1.639