x2
x
=0
6x2-13x
6x2-13x-19=0
6x2-13x-15=0
6x2-13x-8=0
6x2-13x-5=0
6x2-13x+2=0
6x2-13x+5=0
6x2-13x+6=0
6x2-13x+7=0
-19
-15
-8
-5
2
5
6
7