#include <iostream>

using namespace std;


void GetRoot(double a, double b, double c) {

    double discriminant = b * b - 4 * a * c;

    if (discriminant < 0) {
        cout << "Уравнение не имеет корней" << endl;
        return;
    }

    double x1 = (-b + sqrt(discriminant)) / (2 * a);
    double x2 = (-b - sqrt(discriminant)) / (2 * a);
    cout << "x1 = " << x1 << ", x2 = " << x2 << endl;
}

void GetRoot(double a, double b) {
    double x = - b / a;
    cout << "x = " << x << endl;
}

int main() {
    setlocale(LC_ALL, "ru");
    GetRoot(2, 6, 4);
    GetRoot(6, 2, 4);
    GetRoot(6, -2);
    GetRoot(6, 5);
}