#include <iostream>
using namespace std;

#include <math.h>

double F(double x)
{
        double res = pow(x, 9) - pow(x, 7) + 2 * pow(x, 2) -1;

        return res;
}


        
        double low, high;
        cout<<"low=";
        cin>>low;
        cout<<"high=";
        cin>>high;

        for(int i = 0; i < 1000 ; ++i){
                double mid = (float)(low + high)/2;
                double val = F(mid);

                cout << mid << ":" << val << endl;

                if(val < 0.00001 && val > -0.00001){
                        cout << "Root is " << mid << endl;
                        return;
                }
                else if (val < 0 )
                        low = mid;
                else
                        high = mid;
        }
}

int main(int argc, char **argv){
        print_roots();
        system("pause");
        return 0;
}