Answer:
you would fill in -1 for you "x" and the answer would be 8
Step-by-step explanation:
18y
C
r=-3, 3,0
factor -
3r(r-3) (r+3) ,
solution-
3r=0 , r=0
3r^2-9r =0
3r^2=9r
r=3,
r+3=0
r= -3
