x2
x
=0
-10x2+11x
-10x2+11x-3=0
-10x2+11x-1=0
-10x2+11x+6=0
-10x2+11x+8=0
-10x2+11x+18=0
-10x2+11x+21=0
-3
-
6
8
18
21