x2
x
=0
-18x2
-18x2-20x
-18x2-19x
-18x2-18x
-18x2-17x
-18x2-16x
-18x2-15x
-18x2-14x
-18x2-13x
-18x2-12x
-18x2-11x
-18x2-10x
-18x2-9x
-18x2-8x
-18x2-7x
-18x2-6x
-18x2-5x
-18x2-4x
-18x2-3x
-18x2-2x
-18x2-x
-18x2+x
-18x2+2x
-18x2+3x
-18x2+4x
-18x2+5x
-18x2+6x
-18x2+7x
-18x2+8x
-18x2+9x
-18x2+10x
-18x2+11x
-18x2+12x
-18x2+13x
-18x2+14x
-18x2+15x
-18x2+16x
-18x2+17x
-18x2+18x
-18x2+19x
-18x2+20x
-18x2+21x
-18x2+22x
-18x2+23x