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Defining Trinomials in Business Cost Models

A retail manager uses the algebraic expression $0.04x^2 + 15x + 250toestimatethemonthlyoperatingcostsofastore,whereto estimate the monthly operating costs of a store, wherex$ represents the number of items sold. This specific type of expression is classified as a 'trinomial.' Based on the mathematical definition of this term, what is the exact requirement regarding the number of terms that an expression must have to be called a trinomial?

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Updated 2026-04-16

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