Trinomials are polynomials that contain three parts called terms, which are separated by plus and minus symbols. Here is a visual example of a trinomial:

${\displaystyle ax+by+c}$

This is a linear expression, a component that makes up linear equations.

• ${\displaystyle ax^{2}+bx+c}$, a quadratic expression in its standard (normal) form, which happens to be a trinomial.
• Perfect square trinomials, ${\displaystyle a^{2}\pm 2ab+b^{2))$.

• Monomial

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