Terminology of polynomial
Next we need to get some terminology out of the way.
A monomial is a polynomial which consists of exactly one term.
A binomial is a polynomial which consists of exactly two terms.
Finally, a trinomial is a polynomial which consists of exactly three terms.
We will utilize these terms off and on so that you should probably be at least somewhat familiar with them.
Adding, subtracting and multiplying polynomials
This is probably best done along a couple of examples.