FALSE POSITION

#include<bits/stdc++.h>
#include<string.h>
using namespace std;
const int MAX_ITERATION = 1e4;

double root; /// Answer

double f(double x)
{
    return x*x - 4*x - 10;  // -1.742 , 5.742
}


void FLASE_POSITION(double a,double b)
{
    if(f(a)==0 || f(b)==0)
    {
        f(a)==0?root=a:root=b;
        return;
    }

    if(f(a)*f(b) >0)
    {
        puts("WRONG INITIAL GUESS");
        exit(0);
    }

    for(int i = 1;i <= MAX_ITERATION; i++)
    {
        root = (a*f(b) - b*f(a)) / (f(b) - f(a));

        if(f(root) == 0)
        {
            break;
        }
        if(f(root)*f(a) < 0)
        {
            b = root;
        }
        else
        {
            a = root;
        }
    }

}

int main()
{

    double a,b;

    scanf("%lf %lf",&a,&b);

    FLASE_POSITION(a,b);

    printf("One root of the equation is : %.06lf\n",root);

    return 0;
}