#include
#include
int main() {
double a,b,c,x1,x2,delta;
scanf ("%lf%lf%lf",&a,&b,&c);
delta = b*b-4*a*c;
if(delta >= 0.0) {
x1 = (-b + sqrt(delta))/(2*a);
x2 = (-b - sqrt(delta))/(2*a);
printf ("x1 = %.2lf\n",x1);
printf ("x2 = %.2lf\n",x2);
}
else printf("没有实数根。\n");
return 0;
}