Answer:
A. 0
Step-by-step explanation:
3ab+5b-6
= 3(-1)(3)+5(3)-6
=3(-3)+15-6
=-9+9
=0 ( you have to subtract because they don't have the same signs)
use the substitution method
3ab+5b-6
3(-1)(3)+5(3)-6
Mutiply 3(-1)(3) first
3(-1)(3)= -3*3= -9
-9+5(3)-6
then mutiply
5(3)= 15
-9+15-6
= 6-6
= 0
Answer : A. 0
