Answer:
The answer is -20
Step-by-step explanation:
This prblem calls for substitution. In this case, if a = 3 and b = -4, then
(3)²(-4) - (-4)²
Now we can solve using order of operations.
(9)(-4) + 16 << (two negatives make a positive)
-36 + 16
= -20
Hope this helps!
