x2+4x−1=0x^{2}+4 x-1=0x2+4x−1=0
11x2+6x+1=011 x^{2}+6 x+1=011x2+6x+1=0
2x2−6x+7=02 x^{2}-6 x+7=02x2−6x+7=0
x2−6x+11=0x^{2}-6 x+11=0x2−6x+11=0
No correct answer