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