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Concept

Trinomial

A trinomial is a polynomial with exactly three terms, which are combined by addition or subtraction. Below are some examples of trinomials.

6 x - 2 y + 7 z, 3 x^{3} + 4 x^{2} - 1

Notice that a polynomial is a trinomial only if it cannot be simplified to have less than three terms. For example, the following polynomial is not a trinomial but a binomial.

2 x - 15 y + 5 x = 7 x - 15 y

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