x2−8x+10=0x^{2}-8 x+10=0x2−8x+10=0
x2−8x−10=0x^{2}-8 x-10=0x2−8x−10=0
x2−4x+2=0x^{2}-4 x+2=0x2−4x+2=0
x2−4x−2=0x^{2}-4 x-2=0x2−4x−2=0