Answer:
12^9
Step-by-step explanation:
12^8 * 12^-8
according to law of integers, since both numbers are the same we can work with their roots, and the multiplication would be addition;
8+(-8)= 0
(12*12)^0 ----numerator
(denominator)
12^-9
division = subtraction in the laws of integers
0-(-9)= 0+9=9
(12*12)/12= 12
=12^9
