Did you solve the problem correctly?

Question

Java

Given:
Write a program to solve a quadratic equation. A quadratic equation is an equation of the form ax2 + bx + c = 0; Please note that the input and result can be with a decimal part.

my decision:

package java2;
import java.util.Scanner;
import java.math.*;

public class SecondHomeWork {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.println("Введите значение a: ");
        double valueA = scan.nextDouble();
        System.out.println("Введите значение b: ");
        double valueB = scan.nextDouble();
        System.out.println("Введите значение c: ");
        double valueC = scan.nextDouble();
        double result = (valueB * valueB) - (4 * valueA * valueC);
        System.out.println(result);


    }
}

Answer 1

Not right. Even mathematically wrong.
b^2-4ac is the discriminant formula. Not roots.

Answer 2

Double can count incorrectly, don't use it in calculations
After all, what's stopping you from checking the program's performance. Calculate on a piece of paper and compare with what you counted