C++ :

#include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;
int main()
{
	double a,b,c;
	cin>>a>>b>>c;
	double dis=b*b-4*a*c;
	double p=-b/(2*a),q=sqrt(dis)/(2*a);
	printf("%.2lf %.2lf\n",p+q,p-q);
	return 0;
}