Final answer:
The expression 4x⁴–3x'y' +2y is classified as a trinomial because it contains exactly three terms.
Step-by-step explanation:
The expression given is 4x⁴–3x'y' +2y. To determine its classification based on the number of terms, we take a closer look at its components. An expression can be classified into different types based on the number of terms it contains: monomial (1 term), binomial (2 terms), trinomial (3 terms), and so on.
In this case, the expression consists of three separate terms: 4x⁴, -3x'y', and 2y. Each term is separated by a plus (+) or minus (-) sign. Therefore, this expression is a trinomial because it contains precisely three terms.