3. Write a program to determine the roots of quadratic equation

 SOURCE CODE:

#include <stdio.h>

#include<math.h>

int main()

{   float a,b,c,D,x,y;

    printf("enter the coefficients of quadratic equation\n");

    scanf("%f %f %f",&a,&b,&c);

    D=(b*b-4*a*c);

    x=(-b+sqrt(D))/(2*a);

    y=(-b-sqrt(D))/(2*a);

    printf("discriminant is %f\n",D);

    if(D==0){

        printf("roots are real and equal: %f, %f",x,y);

    }

    else if(D>0){

        printf("roots are real: %f, %f",x,y);

    }

    else{  

           printf("roots are imaginary: %f+%fi , %f-%fi",(-b/2*a),sqrt(-D)/(2*a),(-b/2*a),sqrt(-D)/(2*a));

    }

    return 0;

}