x2
x
=0
-2x2-5x
-2x2-5x-3=0
-2x2-5x-2=0
-2x2-5x+3=0
-2x2-5x+7=0
-2x2-5x+12=0
-2x2-5x+18=0
-3
-2
3
7
12
18