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