<xmp>UNKNOWN
//**************************************
// Name: Akar Kembar
// Description:mencari akar kembar, x1 dan x2
// By: Mr. SNMP Simamora
//
//
// Inputs:bilangan integer: ax^2 + bx + c
//
// Returns:bilangan integer (positip atau negatip)
//
//Assumes:None
//
//Side Effects:dang adong...
//This code is copyrighted and has limited warranties.
//Please see http://www.Planet-Source-Code.com/xq/ASP/txtCodeId.6585/lngWId.2/qx/vb/scripts/ShowCode.htm
//for details.
//**************************************

import javax.swing.JOptionPane;

    public class persFK1 {

        public static void main(String args[]) {
        double x1,x2,a,b,c,z,v;
        System.out.println("Bentuk PFK: ax^2+bx+c");
        String a1=JOptionPane.showInputDialog("Masukkan a:");
        a=Double.parseDouble(a1);
        String b1=JOptionPane.showInputDialog("Masukkan b:");
        b=Double.parseDouble(b1);
        String c1=JOptionPane.showInputDialog("Masukkan c:");
        c=Double.parseDouble(c1);
        z=b*b-4*a*c;
        v=Math.sqrt(z);
        x1 = (-1*b+v)/(2*a);
        x2 = (-1*b-v)/(2*a);
        System.out.println("x1 = " + x1);
        System.out.println("x2 = " + x2);
        System.exit(0);
    }
}
		</xmp>