solution

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


int main()
{
 float a,b,c,d,root1,root2;
 cout<<"Enter value of  a, b and c : ";
 cin>>a>>b>>c;

 d=b*b-4*a*c;

 if(d==0)
 {
  root1=(-b)/(2*a);
  root2=root1;
  cout<<"Roots are real & equal";
   }
 else if(d>0)
 {
  root1=-(b+sqrt(d))/(2*a);
  root2=-(b-sqrt(d))/(2*a);
  cout<<"Roots are real & distinct";
 }
 else
 {
  root1=(-b)/(2*a);
  root2=sqrt(-d)/(2*a);
  cout<<"Roots are imaginary";
 }

 cout<<"\nRoot 1= "<<root1<<"\nRoot 2= "<<root2;

 getch();
 return 0;
}