what us -a^-2 if a =-5?
Using the given value of a = -5, we can substitute it into the expression -a^-2:
-a^-2 = -(-5)^-2
Simplifying this expression:
-(-5)^-2 = -(1/(-5)^2) = -(1/25)
Therefore, -a^-2 is equal to -1/25 when a = -5.
-a^-2 = -(-5)^-2
Simplifying this expression:
-(-5)^-2 = -(1/(-5)^2) = -(1/25)
Therefore, -a^-2 is equal to -1/25 when a = -5.