Question

How to evaluate (-5)^-3 when 5 is a prime number.

Answer 1

`\left( -5\right)^(-3) =-(1)/(125)`

Explanation:

`\left( -5\right)^(-3) =(1)/(\left( -5\right)^(3) ) =(1)/(-(5)^(3) ) =(1)/(-125) =-(1)/(125)`