# Java program to prints all real solutions to the quadratic equation ax2+bx+c = 0

Write a Java program that prints all real solutions to the quadratic equation ax2+bx+c = 0. Read in a, b, c and use the quadratic formula. If the discriminant b2-4ac is negative, display a message stating that there are no real solutions.

```1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 import java.io.*; class Quadratic { public static void main(String args[])throws IOException { double x1,x2,disc,a,b,c; InputStreamReader obj=new InputStreamReader(System.in); BufferedReader br=new BufferedReader(obj); System.out.println("enter a,b,c values"); a=Double.parseDouble(br.readLine()); b=Double.parseDouble(br.readLine()); c=Double.parseDouble(br.readLine()); disc=(b*b)-(4*a*c); if(disc==0) { System.out.println("roots are real and equal "); x1=x2=-b/(2*a); System.out.println("roots are "+x1+","+x2); } else if(disc>0) { System.out.println("roots are real and unequal"); x1=(-b+Math.sqrt(disc))/(2*a); x2=(-b+Math.sqrt(disc))/(2*a); System.out.println("roots are "+x1+","+x2); } else { System.out.println("roots are imaginary"); } } }```

### 8 Responses to “Java program to prints all real solutions to the quadratic equation ax2+bx+c = 0”

1. lingesh

Scanner class is used to get the input from the user.
ex:
int x;
Scanner sc = new Scanner();
x=sc.nextInt();
system.out.print(x);

2. Thank you for sharing your info. I truly appreciate your efforts and I am waiting for your next post thanks once again.

3. Iām not that much of a internet reader to be honest but your sites really
nice, keep it up! I’ll go ahead and bookmark your
site to come back later. Cheers

4. import java.util.Scanner;
{
public static void main(String[] arg)
{
Scanner sc=new Scanner(System.in);
System.out.print(“Vlera e a: “);
double a=sc.nextDouble();
System.out.print(“Vlera e b: “);
double b=sc.nextDouble();
System.out.print(“Vlera e c: “);
double c=sc.nextDouble();

if(a==0&&b!=0)
{
System.out.println(“Ekuacioni eshte linear dhe x= “+(-c/b));
System.exit(0);
}
if(a==0&&b==0&&c!=0)
{
System.out.println(“Ekuacioni nuk ka zgjidhje”);
System.exit(0);
}
if(a==0&&b==0&&c==0)
{
System.out.print(“Sistemi eshte i pacaktuar”);
System.exit(0);
}
double d=Math.pow(b,2)-4*a*c;

if(d<0)
{
d=Math.abs(d);
double x1=(-b+Math.sqrt(d))/2*a;
double x2=(-b-Math.sqrt(d))/2*a;
System.out.println("x1="+x1+"i , x2="+x2+"i");
}
else{
double x1=(-b+Math.sqrt(d))/2*a;
double x2=(-b-Math.sqrt(d))/2*a;
System.out.println("x1="+x1+" ,x2="+x2);
}
}

}