import java.util.*;
public class akar{
static double D(int a,int b,int c){
return (Math.pow(b,2)-4*a*c);
}
static double x1(int a,int b,int c){
return (-b + Math.sqrt(D(a,b,c)))/2*a;
}
static double x2(int a,int b,int c){
return (-b - Math.sqrt(D(a,b,c)))/2*a;
}
static double x(int a,int b){
return (-b/(2*a));
}
static void PK(int a,int b,int c){
if (D(a,b,c)>0){
System.out.println("x1 = "+x1(a,b,c));
System.out.println("x2 = "+x2(a,b,c));
System.out.println("");
System.out.println("Akar-akar persamaan kuadrat nyata dan berbeda");
System.out.println("Karena D>0, maka persamaan kuadrat tidak mempunyai dua akar Real yg berlainan.");
}else if(D(a,b,c)==0){
System.out.println("x...