Kvadrātvienādojums

import java.lang.Math;
import java.util.Scanner;

public class math {
    public static void main(String[] args) {
        Scanner ascan = new Scanner(System.in);
        Scanner bscan = new Scanner(System.in);
        Scanner cscan = new Scanner(System.in);
        System.out.println("A veertiiba?");
        String astring = ascan.nextLine();
        System.out.println("B veertiiba?");
        String bstring = bscan.nextLine();
        System.out.println("C veertiiba?");
        String cstring = cscan.nextLine();
        int a = Integer.parseInt(astring);
        int b = Integer.parseInt(bstring);
        int c = Integer.parseInt(cstring);
        int y;

        if (b > 0) {
            int x = b * 2;
            y = b - x;
        }else{
            int x = b * (-2);
            y = b + x;
        }

        int l = a * 2;
        int m = (b * b) - (4 * a * c);
        double n = Math.sqrt(m);
        double o = y + n;
        double p = y - n;
        double f1 = o / l;
        double f2 = p / l;

        System.out.println("x1 = " + f1);
        System.out.println("x2 = " + f2);

    }

}