$\"\"$

The polynomial is $\"\"$ .

Horizontal method:

Apply distributive property: $\"\"$ .

$\"\"$

$\"\"$ (Multiply: $\"\"$ )

$\"\"$ (Apply multiplicative identity property: $\"\"$ )

The value of $\"\"$ $\"\"$ . $\"\"$

Vertical method:

$\"\"$

(Multiply: $\"\"$ ) (Multiply: $\"\"$ )

(Apply multiplicative identity property: $\"\"$ )

Thus, The value of $\"\"$ $\"\"$ . $\"\"$

The value of $\"\"$ $\"\"$ .