To complete the table, we have to evaluate the terms of the function at different values of x within the range

Now, we are going to evaluate the values:

Evaluating

at the above values, we get:

Evaluating

we get:

Evaluating

at the given values we get 3 because it does not depend on x.
Finally, to complete the row for f(x) we will add the values we got from each evaluation.
Answer: