x2+x+1=0x^{2}+x+1=0x2+x+1=0
x2+x−1=0x^{2}+x-1=0x2+x−1=0
x2−x−1=0x^{2}-x-1=0x2−x−1=0
x2−x+1=0x^{2}-x+1=0x2−x+1=0