3a^3*b-6a^2*d^2 = 3a^2*(ab-2d^2)
2k(3k-4) + (3k - 4) = (3k-4)(2k + 1)=6k^2+3k - 8k - 4 = 6k^2 - 5k - 4
(a+3)^2 - (a+3)(b+6)=
3a^3*b-6a^2*d^2 = 3a^2*(ab-2d^2)
2k(3k-4) + (3k - 4) = (3k-4)(2k + 1)=6k^2+3k - 8k - 4 = 6k^2 - 5k - 4
(a+3)^2 - (a+3)(b+6)=