posted by Margie... .
I will be happy to critique your work.
I think it is:
The negative two hundred is right.
(x^a)^b = x^ab
Now redo the x and y powers, and you will have it.
I know the first one is 81 but what is the second one?
81? are you kidding?
(-2x^2y)^3 = -8 x^6 y^3