二元一次方程

import java.util.*;
    public class Equation2 {
        public static void main(String[] args) {

            Scanner in = new Scanner(System.in);
            double a,b,c;
            double x1,x2;
            System.out.print("请输入a：");
    a = in.nextInt();
            System.out.print("请输入b：");
    b = in.nextInt();
            System.out.print("请输入c：");
    c = in.nextInt();

            x1 = ((-b)+Math.sqrt(b*b-4*a*c))/(2*a);
            x2 = ((-b)-Math.sqrt(b*b-4*a*c))/(2*a);

            System.out.print("x1="+x1+"\tx2="+x2);
        }
    }