hsksebhssv hnshsnsjdndj ldgehsiw c 3072729 lvwjaiwn sj. +a iwiwirbfhx ska hamd +675196 = $ 20000 solved
-8, -48, -288
or
-8, -4/3, -2/9
It would be subtraction I think
A: 0 3 4 5 5 6 7 9 9 20
3 3 5 5 6 8 8 9 9
B: No, they are not symmetric
See the attached picture.
The negative sign in front of the 2 makes the graph an upside down U shape.