#include "iostream.h"

      #include "math.h"

      #include "stdlib.h"

       

      double f(double x)

      {

          return pow(x, 3)+2*pow(x, 2)+3*x+5;
 
      }

       

      double df(double x)

      {

        return 3*pow(x, 2)+4*x+3;

      }

       

      int main()

      {

        double eps = 0.001;

        double x = 0;

        while( fabs(f(x)) > eps )

        {

          x = x - f(x)/df(x);

        }

        cout << x << endl;

        system("pause");

        return 0;
      }