$\"\"$

The functions are $\"\"$ and $\"\"$ .

Find $\"\"$ .

$\"\"$ (Subtraction of functions formula)

$\"\"$ (Substitute $\"\"$ and $\"\"$ )

$\"\"$ (Distributive property: $\"\"$ )

$\"\"$ (Combine like terms)

$\"\"$

Find the domain of the function.

The domain of the function is $\"\"$ .

Any polynomial function is defined for all values of $\"\"$ .

Therefore, the domain of the function is $\"\"$ .

$\"\"$

The function is $\"\"$ and domain is $\"\"$ .