I think the problem lies with the question. Simple question gets simple answer. If you want the solution in the general real case, ask x^3 = 7 since it cannot b

I think the problem lies with the question. Simple question gets simple answer. If you want the solution in the general real case, ask x^3 = 7 since it cannot be solved by the easiest method. If you ask to solve x^3 = 8, I firmly believe it is fair game to solve using a method that only works for small integer.