#include <iostream>
#include <cmath>
using namespace std;

int main() {
  double a,b,c,D;

  cin >> a >> b >> c;
  if(a==0) {
    if(b!=0)
      cout << (-c/b) << '\n';
  }
  else {
    D = b*b-4*a*c;
    if(D < 0) {
      cout << -b/(2*a) << "±" << sqrt(-D)/(2*a) << "*i" << endl;
    }
    else {
      cout << -b/(2*a) + sqrt(D)/(2*a) << ", ";
      cout << -b/(2*a) - sqrt(D)/(2*a) << endl;
    }
  }
  return 0;
}