#include <bits/stdc++.h>

using namespace std;

ifstream f("ecuatii.in");
ofstream g("ecuatii.out");

char ecuatie[50],semn;
int delta,k=1,a,b,c;

int main()
{
    f.getline(ecuatie,50);
    strcat(ecuatie,"x");
    if(ecuatie[0]=='-')
    {
        if(ecuatie[k]=='x') a=-1;
        else
        {
            while(ecuatie[k]!='x')
            {
                a=a*10+(ecuatie[k]-'0');
                k++;
            }
            a=-a;
        }
        k+=3;
        if(ecuatie[k]=='+') semn='+';
        else semn='-';
        k++;
        if(ecuatie[k]=='0') b=0,k+=2;
        else if(ecuatie[k]=='x')
        {
            if(semn=='+') b=1;
            else b=-1;
            k++;
        }
        else
        {
            while(ecuatie[k]!='x')
            {
                b=b*10+(ecuatie[k]-'0');
                k++;
            }
            if(semn=='-') b=-b;
            k++;
        }
        if(ecuatie[k]=='+') semn='+';
        else semn='-';
        k++;
        if(ecuatie[k]=='0') c=0;
        else
        {
            while(ecuatie[k]!='x')
            {
                c=c*10+(ecuatie[k]-'0');
                k++;
            }
            if(semn=='-') c=-c;
        }
    }
    else
    {
        k=0;
        if(ecuatie[k]=='x') a=1;
        else
        {
            while(ecuatie[k]!='x')
            {
                a=a*10+(ecuatie[k]-'0');
                k++;
            }
        }
        k+=3;
        if(ecuatie[k]=='+') semn='+';
        else semn='-';
        k++;
        if(ecuatie[k]=='0') b=0,k+=2;
        else if(ecuatie[k]=='x')
        {
            if(semn=='+') b=1;
            else b=-1;
            k++;
        }
        else
        {
            while(ecuatie[k]!='x')
            {
                b=b*10+(ecuatie[k]-'0');
                k++;
            }
            if(semn=='-') b=-b;
            k++;
        }
        if(ecuatie[k]=='+') semn='+';
        else semn='-';
        k++;
        if(ecuatie[k]=='0') c=0;
        else
        {
            while(ecuatie[k]!='x')
            {
                c=c*10+(ecuatie[k]-'0');
                k++;
            }
            if(semn=='-') c=-c;
        }
    }
    delta=b*b-4*a*c;
    if(delta<0) g<<-1;
    else
    {
        if(delta==0)
        {
            float radacina=-b/(2*a);
            g<<fixed<<setprecision(2)<<radacina;
        }
        else
        {
            float radacina1, radacina2;
            radacina1=(-b+sqrt(delta))/(2*a);
            radacina2=(-b-sqrt(delta))/(2*a);
            if(radacina1<radacina2) g<<fixed<<setprecision(2)<<radacina1<<" "<<fixed<<setprecision(2)<<radacina2;
            else g<<fixed<<setprecision(2)<<radacina2<<" "<<fixed<<setprecision(2)<<radacina1;
        }
    }
    return 0;
}