What is -a^-2 if a = -5? Responses -25 -25 25 25 Image with alt text: negative start fraction 1 over 25 end fraction
When a = -5, we can plug in this value into the expression -a^-2:
-a^-2 = -(-5)^-2
Now, let's solve this expression. First, we calculate the value of (-5)^-2:
(-5)^-2 = 1/(-5)^2 = 1/25
Finally, since there is a negative sign in front of our expression, we have:
-a^-2 = -1/25.
So the correct answer is -1/25.