x2
x
=0
-8x2-18x
-8x2-18x-10=0
-8x2-18x-9=0
-8x2-18x-7=0
-8x2-18x-4=0
-8x2-18x+5=0
-8x2-18x+11=0
-8x2-18x+18=0
-10
-9
-7
-4
5
11
18