Answer:
Step-by-step explanation:
To have anything to a power is just multiplying the number as many times as it says to. ex. 2^3 is two times itself 3 times. 2 x 2 x 2= 8
In your case, you need to multiply -4 x -4 because the exponents tell you how many of the number you multiply.
-4 x -4 = 16
Hope this helps :)
