#include <iostream>
#include<math.h>
using namespace std;
// ax2 + bx + c
float a, b, c, x, d, x1, x2, r1, r2;
double rad;


main()
{
    cout << "Ecuatia are forma ax*2 + bx + c, introdu valoarea lui a:  "; cin >> a;
    cout << "Intordu valoarea lui b:  "; cin >> b;
    cout << "Intordu valoarea lui c:  "; cin >> c;
    d = b*b - 4*a*c;
    if(b == 0 && c != 0 && a != 0){return 0;}
    else if (a == 0)
    {
        cout << "Ecuatia devine una de gradul intai" << endl;
        if(b == 0 && c == 0)
{
cout << "Ecuatia are o infinitate de solutii \n";
}
else
{
x = c/b;
cout << "Necunoscuta este egala cu: " << x << endl;
}
if (b == 0)
{
cout << "Ecuatia nu are solutii \n";
}
    }
    else if (b != 0 && c != 0 && a != 0)
        {
    cout << "Delta egal cu: " << d << endl;
    if (d < 0){
    cout << "Ecuatia nu are valori reale";
     return 0;}
    if (d == 0)
    {
    cout << "X1 = " << b / 2*a << endl;
    }
    else
    {
    rad=sqrt(d);
    r1 = -b - rad;
    r2 = -b + rad;
    cout << "X1 = " << r1 / 2*a << endl;
    cout << "X2 = " << r2 / 2*a << endl;
    }
    }

}