x2
x
=0
6x2+23x
6x2+23x-18=0
6x2+23x-13=0
6x2+23x-4=0
6x2+23x+7=0
6x2+23x+10=0
6x2+23x+15=0
6x2+23x+17=0
6x2+23x+20=0
6x2+23x+21=0
6x2+23x+22=0
-18
-13
-4
7
10
15
17
20
21
22