Answer:
-3
Step-by-step explanation:
It would just be -12+9=-3.
Let y = (b)ˣ
1) if b> 0, then growth, whatever the value of x>0
2) if b< 0, then decay, whatever the value of x >0
3) if b<0, then decay, whatever the value of x >0
4) if b<0, then growth, whatever the value of x <0