Question
Classify the following polynomials as monomials, binomials, trinomials. Which polynomials do not fit in any category?
5x - 4y + 3x

Answer

Definitions: A polynomial is monomial if it has exactly one term. It is called binomial if it has exactly two non-zero terms. A polynomial ​is a trinomial if it has exactly three non-zero terms.
The polynomial 5x - 4y + 3x has exactly three terms, i.e. 5x, -4y and 3x. Therefore, it is a trinomial.

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