x2−x+25=0x^{2}-x+25=0x2−x+25=0
x2+x−25=0x^{2}+x-25=0x2+x−25=0
x2+x+25=0x^{2}+x+25=0x2+x+25=0
x2+11x+25=0x^{2}+11 x+25=0x2+11x+25=0