| area model | a graphic representation of a multiplication problem, in which the length and width of a rectangle are the factors and the area is the product |
| binomial | a sum of two monomials, such as 3x2 + 7 |
| special product | a product resulting from binomial multiplication that has certain characteristics. For example x2 – 25 is called a special product because both its terms are perfect squares and it can be factored into (x + 5)(x – 5). |