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