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{{ printedBook.courseTrack.name }} {{ printedBook.name }} An **algebraic expression** is a valid combination of numbers, variables, and mathematical operations.
For example, in the expression $2x+3,$ the variable $x$ is being *multiplied* by its coefficient $2;$ then, this product is *added* to the constant $3.$

Algebraic expressions come in many forms; they can be monomials, like the $2x$ in the binomial expression above. In a polynomial, each monomial separated by a $+$

or $-$

sign is called a term.
$\begin{gathered}
\text{-}3x^2+2x-1
\end{gathered}$
An entire polynomial, like the trinomial above, is also called an algebraic expression. However, an expression that only contains constants is called a numerical

or numeric expression.