#include <stdio.h>
#include <math.h>
int main(void)
{
double a,b,c,disc,x1,x2,realpart,imagpart;
scanf("%lf,%lf,%lf",&a,&b,&c);
printf("The equation\n");
if(fabs(a)<1e-6)
{
printf("is not a quadratic\n");
}
else {
disc=b*b-4*a*c;
if(fabs(disc)<=1e-6)
{
printf("has two equal roots:%8.4lf\n",-b/(2*a));
}
else if(disc>1e-6)
{
x1=(-b+sqrt(disc))/2*a;
x1=(-b-sqrt(disc))/2*a;
printf("%8.4lf,%8.4lf",x1,x2);
}else
{
realpart=-b/(2*a);
imagpart=sqrt(-disc)/2*a;
printf("%8.4lf+%8.4lfi\n",realpart,imagpart);
printf("%8.4lf-%8.4lfi\n",realpart,imagpart);
}
}
return 0;
}