Final answer:
A trinomial is an algebraic expression consisting of three terms. The expression 4x³ + x² - 1 is a trinomial.
Step-by-step explanation:
Trinomial in Algebra
A trinomial is an algebraic expression that consists of three terms connected by addition or subtraction operations. In the given options, the trinomial expression is:
4x³ + x² - 1
This expression has three terms (4x³, x², and -1) connected by addition and subtraction operations, making it a trinomial.
Learn more about Trinomials in algebra