C++ Program to Find All The Roots Of A Quadratic Equation


A quadratic equation has the form ax^2+bx+c=0 where x is an unknown, and a, b, c represent values which in this c++ program will be supplied by the user.


Also Read: C++ Program To compute least common multiple



#include<iostream.h>
#include<conio.h>
#include<math.h>


void main()
{
 float a,b,c,d,x1,x2;
 
        cout<<"Enter the value of  a: ";
 cin>>a;
        cout<<"Enter the value of  b: ";
 cin>>b;
        cout<<"Enter value of  c: ";
 cin>>c;
 
        d=b*b-4*a*c;

 if(d==0)
 {
  x1=(-b)/(2*a);
  x2=root1;
  cout<<"The Roots are real & equal";
   }
 else if(d>0)
 {
  x1=-(b+sqrt(d))/(2*a);
  x2=-(b-sqrt(d))/(2*a);
  cout<<"the Roots are real & distinct";
 }
 else
 {
  x1=(-b)/(2*a);
  x2=sqrt(-d)/(2*a);
  cout<<"Roots are imaginary";
 }

 cout<<x1<<" "<<x2;
}

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