Java program to create a class qurd to solve the quadratic equation

A Class quad contains the following data members and member function s to find the roots of quadratic equation.

Class Name : quad

Data Members:

a,b,c(float) x,y(float)

Member Function/Method:

quad(float,float,float): constructor to assign values to the data members

float discriminant(): to return the discriminant [b1-4ac]

void root_equal(): to display the root if both roots are equal.

void image(): to display the root if roots are imaginary.

void root_real(): to display the two real, unequal roots.

void root(): to call other appropriate functions to find the solutions of the problem.

import java.util.*;
class quad
{
    float a,b,c,x1,x2;
    quad(float k1,float k2,float k3)
    {
        
        a=k1;
        b=k2;
        c=k3;
    }
    float discriminant()
    {
        float dis;
        dis=(b*b)-(4*a*c);
        return dis;
    }
    void root_equal()
    {
        float d=discriminant();
        if(d==0)
        {
            System.out.println("ROOTS ARE EQUAL:"+x1+" "+x2);
        }
    }
    void image()
    {
        float d=discriminant();
        if(d<0)
        {
            System.out.println("ROOTS ARE IMAGINARY:"+x1+" "+x2);
        }
    }
    void root_real()
    {
        float d=discriminant();
        if(d>0)
        {
            System.out.println("ROOTS ARE REAL:"+x1+" "+x2);
        }
    }
    void root()
    {
        float d=discriminant();
        x1=((-b)+(float)Math.sqrt(d))/(2*a);
        x2=((-b)-(float)Math.sqrt(d))/(2*a);
    }
    public static void main(String args[])
    {
        Scanner sc=new Scanner(System.in);
        System.out.println("Enter 3 no");
        float a=sc.nextFloat();
        float b=sc.nextFloat();
        float c=sc.nextFloat();
        quad ob=new quad(a,b,c);
        ob.root();
        ob.root_equal();
        ob.image();
        ob.root_real();
    }
}

Enter 3 no

1

7

3

ROOTS ARE REAL:-0.45861864 -6.5413814