C Program to Find Roots of a Quadratic Equation

In algebra quadratic equation refers to any equation that can be arranged in the form of ax2+bx+c=0. The formula to solve the quadratic equation is as follows:

-b+sqrt(b2-4ac)/2a or -b-sqrt(b2-4ac)/2a

You can also calculate the roots of a quadratic equation using c programming language. Below is the program to find roots of quadratic equation.

Roots of a Quadratic Equation in C Programming

#include<stdio.h>
#include<math.h>
int main()
{
    int a,b,c,d;
    double root_1,root_2;
    printf("\n\nEnter the Values of A, B, C, Where (a*X*X) + ( b*X ) + (c) = 0\n");
    scanf("%d%d%d",&a,&b,&c);
    d= (b*b)-(4*a*c);
    if( d>=0 )
    {
        root_1=(-b+sqrt(d))/(2*a);
        root_2=(-b-sqrt(d))/(2*a);
        printf("First root = %.2lf\n", root_1);
        printf("Second root = %.2lf\n", root_2);
    }
    else
    {
        printf("First Root = %.2lf + i%.2lf\n", -b/(double)(2*a), sqrt(-d)/(2*a));
        printf("Second Root = %.2lf - i%.2lf\n", -b/(double)(2*a), sqrt(-d)/(2*a));
    }
    return 0;
}

Enter the Values of A, B, C, Where (a*X*X) + ( b*X ) + (c) = 0
1 -2 1
First root = 1.00
Second root = 1.00