3x2−2x+1=03 x^{2}-2 x+1=03x2−2x+1=0
2x2−3x−i=02 x^{2}-3 x-i=02x2−3x−i=0
2x2−3x+1=02 x^{2}-3 x+1=02x2−3x+1=0
2x2−2x+1=02 x^{2}-2 x+1=02x2−2x+1=0
