x2−4x+6=0x^{2}-4 x+6=0x2−4x+6=0
x2−3x−8=0x^{2}-3 x-8=0x2−3x−8=0
x2−11x+8=0x^{2}-11 x+8=0x2−11x+8=0
x2−3x+8=0x^{2}-3 x+8=0x2−3x+8=0