Pronunciation: /ɪkˈsprɛ.ʃən/ Explain

An expression is a set of variables, numbers, operators, parenthesis and functions without any equal sign or inequalities that has mathematical meaning. Examples of expressions include:
5x + 2
x2 - 2x + 3
(a + 3)(a - 3)

Examples of mathematical formulas that are not an expression are:
t = 4
0 = x2 - 4x + 2
x + 5 ≤ 37


  1. McAdams, David E.. All Math Words Dictionary, expression. 2nd Classroom edition 20150108-4799968. pg 76. Life is a Story Problem LLC. January 8, 2015. Buy the book
  2. Keigwin, H. W.. Principles of Elementary Algebra. pg 4. Ginn & Company. 1886. Last Accessed 7/9/2018. Buy the book
  3. Alan S. Tussy, R. David Gustafson. Elementary and Intermediate Algebra. 4th edition. pp 74-78. Brooks Cole. April 7, 2008. Last Accessed 7/9/2018. Buy the book

Cite this article as:

McAdams, David E. Expression. 4/20/2019. All Math Words Encyclopedia. Life is a Story Problem LLC.

Revision History

4/20/2019: Updated expressions and equations to match new format. (McAdams, David E.)
12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
7/5/2018: Removed broken links, updated license, implemented new markup, implemented new Geogebra protocol. (McAdams, David E.)
2/3/2010: Added "References". (McAdams, David E.)
8/1/2008: Added several vocabulary links. (McAdams, David E.)
7/12/2007: Initial version. (McAdams, David E.)

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