Negative Exponents.

(a^-2 / a³)^-3

I end up getting a³³

Books says a¹⁵

What gives. :confused: :D

(a^-2 / a³)^-3
=(a^-2 * a^-3)^-3
=(a^{-2 + -3})^-3
=(a^-5)^-3
=a^{-5 * -3}
=a¹⁵

Ah ok. got it. Thanks. :)