Question

Write a function that takes a list L = [a_0,a₁,....,a_n] of coefficients of a polynomial p(x) = a₀xⁿ+a₁x^n-1+...+ a_n

as a single argument, factors the free coefficient , and prints all integer roots or an empty list if there is no integer roots

in Python

Answer 1

import numpy as np


# Utility method to find a number is integer or not
def is_int(x):
    if x % 1 == 0:
        return True
    else:
        return False


# Calculate roots and check if root is integer then print other
# print empty list is no integer roots found.

def calculate_roots(coefficient):
    roots = np.roots(coefficient)
    found = False
    for root in roots:
        if is_int(root):
            found = True
            print(root)

    if not found:
        print([])


# Call the method pass list of coefficients
calculate_roots([2, -2])