Newton

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

float func(float x){
    return x * x * x - 2 * (x * x) - 3 * x + 10;
}

float derivadaFunc(float x){
    return 3 * (x * x) - (4 * x) - 3;
}

float absolut(float x){
    if(x > 0){
        return x;
    }else{
        return (x * -1);
    }
}

int main()
{
    float e = 0.01, x0 = 1.9, x1 = 0;
    int k = 0;
    printf("%.8f\n\n", func(x0)  / derivadaFunc(x0));

    if(absolut(func(x0)) < e){
        printf("X = %.8f", x0);
    }else{

        k = 1;
        do{
            x1 = x0 - (func(x0) / derivadaFunc(x0));

            printf("%d\t %.8f\t %.8f\t %.8f\t\t \n", k, x0, func(x0), absolut(x1 - x0));

            x0 = x1;
            k++;
        }while((absolut(func(x1)) > e) || (absolut(x1 - x0) > e));
    }
    printf("\nX = %.8f\n", x1);
    return 0;
}