Program To Find The Roots Of A Quadratic Equation?

/* C program to find all roots of a quadratic equation */

#include <stdio.h>

#include <math.h>

/* Used for sqrt() */

int main()

{

float a, b, c;

float root1, root2, imaginary;

float discriminant;

printf("Enter values of a, b, c of quadratic equation (aX^2 + bX + c): ");

scanf("%f%f%f", &a, &b, &c);

/* Find discriminant of the equation */

discriminant = (b * b) - (4 * a * c);

/* Find the nature of discriminant */

if(discriminant > 0)

{

root1 = (-b + sqrt(discriminant)) / (2*a);

root2 = (-b - sqrt(discriminant)) / (2*a);

printf("Two distinct and real roots exists: %.2f and %.2f", root1, root2);

}

else if(discriminant == 0)

{

root1 = root2 = -b / (2 * a);

printf("Two equal and real roots exists: %.2f and %.2f", root1, root2);

}

else if(discriminant < 0)

{

root1 = root2 = -b / (2 * a);

imaginary = sqrt(-discriminant) / (2 * a);

printf("Two distinct complex roots exists: %.2f + i%.2f and %.2f - i%.2f",

root1, imaginary, root2, imaginary);

}

return 0;

}

Output:-

Program To Find The Roots Of A Quadratic Equation?