x2
x
=0
-2x2-9x
-2x2-9x-10=0
-2x2-9x-9=0
-2x2-9x-7=0
-2x2-9x-4=0
-2x2-9x+5=0
-2x2-9x+11=0
-2x2-9x+18=0
-10
-9
-7
-4
5
11
18