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