Posted by tuhituhi on Wednesday, January 23, 2013 at 11:25am.
Factor out 3a^2: 3a^2(1+2x^2-ax) That's about as far as we can go. Now, if you had started out with 3a^4 - 6a^3x + 3a^2x^2, you'd have 3a^2(x-a)^2