ProcedurProgramavimas_1.04

#include <iostream>
#include <math.h>
#include <iomanip>

using namespace std;
int main()
{
    long double a, b, c, x;
    cin>>a;
    cin>>b;
    cin>>c;

    x=(b+(sqrt((b*b)-(a*c))))/(2*a);
    cout<<fixed<<setprecision(3)<<x<<endl;

    return 0;
}