#include <iostream>
#include <cmath>
using namespace std;
int main()
{
float a, b, c, D, x1, x2;
std::cin >> a >> b >> c;
std::cout << "Квадратное уравнение a * x ^ 2 + b * x + c = 0;" << std::endl;
std::cout << "a = " << a << ";" << std::endl;
std::cout << "b = " << b << ";" << std::endl;
std::cout << "c = " << c << ";" << std::endl;
D = pow(b,2) - 4 * a * c;
std::cout << "D = " << D << ";" << std::endl;
x1 = (-b + sqrt(D)) / 2 * a;
x2 = (-b - sqrt(D)) / 2 * a;
std::cout << "x1 = " << x1 << std::endl;
std::cout << "x2 = " << x2 << std::endl;
return 0;
}
