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