Final answer:
The expression 6ak² + 6a² + 3a is a trinomial.
Step-by-step explanation:
The expression 6ak² + 6a² + 3a is a trinomial.
- Monomial refers to an expression with a single term.
- Binomial refers to an expression with two terms.
- Trinomial refers to an expression with three terms.
- Not a polynomial refers to an expression that does not fit the definition of a polynomial, which is an algebraic expression consisting of terms that can be combined using addition, subtraction, multiplication, and non-negative integer exponents.
Since the given expression has three terms, it fits the definition of a trinomial.