c programming for raphson method

#include<stdio.h>#include<math.h>#define f(x) (3*x*x+2*x-9)#define df(x) (6*x+2) void main(){float x,a,c; printf(“n Enter the value initial value of xn”);scanf(“%f”,&x);do{c=(-f(x)/df(x));x=x+c;}while (fabs(c)>0.0001);printf(“n The value of the root is=%f”,x);} output:- Enter the initial value of x The value of the root is =1.430501