#include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;
int main()
{
    double a,b,c,d,x1,x2;
    cin>>a>>b>>c;
    d=b*b-4*a*c;
    if(d==0)
    {
        x1=-b/(2*a);
        printf("x1=x2=%0.5f",x1);
    }
    if(d>0)
    {
        x1=(-b+sqrt(d))/(2*a);
        x2=(-b-sqrt(d))/(2*a);
        printf("x1=%0.5f;x2=%0.5f",x1,x2);
    }
    if(d<0)
    {
        x1=-b/(2*a);
        if (x1==0) x1=0;
            x2=sqrt(-d)/(2*a);
            printf("x1=%0.5f+%0.5fi;x2=%0.5f-%0.5fi",x1,x2,x1,x2);
    }
}