x2
x
=0
6x2+19x
6x2+19x-20=0
6x2+19x-11=0
6x2+19x-7=0
6x2+19x+3=0
6x2+19x+8=0
6x2+19x+10=0
6x2+19x+13=0
6x2+19x+14=0
6x2+19x+15=0
-20
-11
-7
3
8
10
13
14
15