Question

I need help with this problem in JAVA, i'm doing a various methdos using Scanner. I have to do the next program for the quadratic equation:

This method calculates the quadratic equation (both roots) and print both results.
Note: this method does not return anything, since it prints theresult by itself.
In the main () method, the method must be invoked quadratic with the corresponding parameters. The signature of the quadratic method is:
Public static void quadratic (int a, int b, int c)

Method: Quadratic

 You must validate that the division can NOT be calculated
with a denominator of zero. If the denominator is 0
(zero) you must print a message that indicates
this.
 You must validate that the value within the square root
must be greater than or equal to zero, otherwise you must
print a message that indicates this.

Thank you very much

Answer 1

import java.util.Scanner;

public class Quadratic {

    public static void quadratic (int a, int b, int c) {
        double d = b*b - 4*a*c;
        if (d < 0 || a == 0) {
            System.out.println("There are no real roots.");
        } else {
            d = Math.sqrt(d);
            System.out.println("Roots are " + ((-b+d)/(2*a)) + " and " + ((-b-d)/(2*a)));
        }
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter a, b and c as integers: ");
        int a = in.nextInt(), b = in.nextInt(), c = in.nextInt();
        quadratic(a, b, c);
        in.close();
    }
}