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