import javax.swing.*;

class Quadratic
{
    public static void main(String[] args)
    
    {
        String aStr,bStr,cStr;
        double a,b,c;
        double disc,r1,r2;

        aStr = JOptionPane.showInputDialog(null,"Enter coefficient of x^2   ");
        bStr = JOptionPane.showInputDialog(null,"Enter coefficient of x     ");
        cStr = JOptionPane.showInputDialog(null,"Enter constant coefficient ");
                     
        a = Double.parseDouble(aStr);
        b = Double.parseDouble(bStr);
        c = Double.parseDouble(cStr);
 
        if (a == 0) { 
                if (b==0) {
                     if (c==0) JOptionPane.showMessageDialog(null,"All x are solutions");
                     else JOptionPane.showMessageDialog(null,"No x are solutions");
                     }
                else JOptionPane.showMessageDialog(null,"the only solution is "+ -c/b);
                }
        else {
                disc = b*b-4*a*c;
                if (disc>0) {
                    r1 = (-b+Math.sqrt(disc))/(2*a);
                    r2 = (-b-Math.sqrt(disc))/(2*a);
                    JOptionPane.showMessageDialog(null,"The two real solutions are " + r1 + " and " + r2);
                    }
                else if (disc == 0) JOptionPane.showMessageDialog(null,"The only solution is " + -b/(2*a));
                     else {
                         double realpart, imagpart;
                         
                         realpart = -b/(2*a);
                         imagpart = Math.sqrt(-disc)/(2*a);
			 if (realpart != 0) 
                             JOptionPane.showMessageDialog(null,"The 2 complex solutions are \n"+
                               realpart + " + " + imagpart + " I " + "\n" +
                               realpart + " - " + imagpart + " I ");
			 else 
			     JOptionPane.showMessageDialog(null,"The 2 complex solutions are \n"+
                               imagpart + " I " + "\n" +
                               " - " + imagpart + " I ");
                         }
              }                           
       System.exit(0);    
    
    }
}