$\"\"$

The function is $\"\"$ .

The factor is $\"\"$ .

Now perform the synthetic division to examine the root.

Dividend is $\"\"$ .

Divisor is $\"\"$ . $\"\"$

The divisor is in the form of $\"\"$ .

$\"\"$

Where $\"\"$ , which is the root.

$\"\"$

The remainder is $\"\"$ .

Therefore, $\"\"$ is a factor of $\"\"$ .

$\"\"$

Reasoning :

Using the factor therom $\"\"$ is a factor if $\"\"$ .

Now substiute $\"\"$ in $\"\"$ . $\"\"$

$\"\"$

Since $\"\"$ , $\"\"$ is the factor the polynomial. $\"\"$

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