$\"\"$

Consider the function $\"\"$ .

The function is divided by factor $\"\"$ .

Factor theorem:

when $\"\"$ then $\"\"$ is a factor of polynomial.

Let $\"\"$ is a factor of $\"\"$ then $\"\"$ .

$\"\"$ .

If $\"\"$ is an odd integer, then $\"\"$ .

$\"\"$ is a factor of $\"\"$ , when $\"\"$ is an odd integer.

$\"\"$

$\"\"$ is a factor of $\"\"$ , when $\"\"$ is an odd integer.