I have a feeling this isn't that hard, it just looks like it, but then again I don't even know how to start it.
Cubing the 2 and putting it back under the root would result in 2^3 = 8
Cubing the a^3 and putting it back under the root would result in (a^3)^3 = a^9
Cubing the b^2 and putting it back under the root would result in (b^2)^3 = b^6
So....we must have had
3√ [ 8 * 12 * a^9 * b^6 * b ] =
3√ [ 96 * a^9 * b^7 ]
Does that make some sense, LF ????
It seems confusing at first, but after you explaining, I understand how you got the final answer, Thanks!