task 19

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

using namespace std;

int main() {
    float a, b, c;
    float d;
    cout << "Enter a: ";
    cin >> a;
    cout << "Enter b: ";
    cin >> b;
    cout << "Enter c: ";
    cin >> c;
    cout << "Your equation is: " << a << "x^2 + " << b << "x + "<< c << " = 0" << endl;
    cout << "D = " << b << "^2 - 4" << a << c << endl;
    d = pow(b, 2) - (4 * a * c);
    cout << "D = " << d << endl;
    if (d < 0) {
        cout << "This equation hasn`t roots";
    }
    else if (d == 0) {
        float x1;
        x1 = ((-1) * b - sqrt(d)) / (2 * a);
        cout << "x = " << x1;
    }
    else {
        float x1, x2;
        x1 = (((-1) * b) - sqrt(d)) / (2 * a);
        x2 = (((-1) * b) + sqrt(d)) / (2 * a);
        cout << "x1 = " << x1 << endl;
        cout << "x2 = " << x2 << endl;
    }
    return 0;
}