// Solving ax^2 + bx + c = 0
#include <iostream>
#include <math.h>
using namespace std;

const double a=1., b=3., c=-4.; 

int main()
{
  if (a != 0){ 
    // quadratic equation
    double D = b*b-4.*a*c; 
    if (D >= 0){
      double x1 = (-b + sqrt(D))/(2.*a); // 1st root
      double x2 = (-b - sqrt(D))/(2.*a); // 2nd root
      cout << x1 << " " << x2 << endl;
    }
  }else{
    // linear equation
    if (b != 0){
      double x1 = - c / b;
      cout << x1 << endl; // root
    }
  }
}