| 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 |
| like terms | two or more monomials that contain the same variables raised to the same powers, regardless of their coefficients. For example, 2x2y and -8x2y are like terms because they have the same variables raised to the same exponents. |
| monomial | a number, a variable, or a product of a number and one or more variables with whole number exponents, such as -5, x, and 8xy3 |
| polynomial | a monomial or sum of monomials, like 4x2 + 3x – 10 |