#include
#include
int main( )
{float a,b,c,d,e,f;
scanf("%f%f%f",&a,&b,&c);
if(a==0&&b==0&&c)printf("无解\n");
else if(a==0&&b)printf("x=%g\n",-c/b);
else
{d=b*b-4*a*c;
e=-b/(2*a);
f=sqrt(abs(d))/(2*a);
if(d==0)printf("x1=x2=%g\n",-b/(2*a));
else if(d>0)printf("x1=%g\nx2=%g\n",e-f,e+f);
else printf("x1=%g-%gi\nx2=%g+%gi\n",e,f,e,f);
}
return 0;
}