PersamaanKuadrat.java

import java.util.Scanner;
import java.text.DecimalFormat;

public class PersamaanKuadrat{
public static void main(String[] args) {
    int a, b, c;
    double D, x1, x2;
   
    Scanner scanInput = new Scanner(System.in);
    System.out.print("Masukkan nilai a: ");
    a = scanInput.nextInt();
    System.out.print("Masukkan nilai b: ");
    b = scanInput.nextInt();
    System.out.print("Masukkan nilai c: ");
    c = scanInput.nextInt();
   
    
    D = b * b - (4 * a * c);
    if(D < 0)
    {
        System.out.println("Akar-akar dari persamaan kuadrat adalah imajiner.");
    }else
    {
        x1 = (-b + Math.sqrt(D)) / (2 * a);
        x2 = (-b - Math.sqrt(D)) / (2 * a);
        DecimalFormat df = new DecimalFormat("#.##");
        System.out.println(String.format("x1 = %.2f",x1));
        System.out.println(String.format("x2 = %.2f",x2));
    }
  }
}