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