Too few arguments error around lines 29 and 32

Code:
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
double f(double a, double b, double c, double x)
{
return pow(x,3)+a*pow(x,2)+b*x+c;
}
double fp(double a, double b, double c, double x)
{
return 3*pow(x,2)+(2*a*x)+b+0*c;
}
double newton(double a, double b, double c, double x)
{
return
...