Algebraic Expressions and Formulas

Mathematics — First Preparatory

Algebraic expressions and terms

An algebraic expression is a mathematical phrase made of numbers, variables (letters) and operations.
A variable is a symbol that stands for an unknown number, such as x or y.
An algebraic term is a product of a number and one or more variables.
The number that multiplies the variables is called the coefficient.
In the term 5x²y the coefficient is 5, the variables are x and y, and the degree of the term is 2 + 1 = 3.
An expression is made of one or more terms separated by plus or minus signs. For example, 3x² − 2x + 7 has three terms.

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