x2
x
=0
-10x2+19x
-10x2+19x-9=0
-10x2+19x-7=0
-10x2+19x-6=0
-10x2+19x+2=0
-10x2+19x+12=0
-10x2+19x+15=0
-9
-7
-6
2
12
15