# Parts of An Expression

*algebraic***is a collection of terms that are separated by addition and/or subtraction.**

*expression***Terms**can be:

•a constant (number by itself) 12

•a variable ( a letter than represents a number) x

•the product of a number and a variable 4y

•the product of two variables xy

•or the product of a constant and more than one variable 3ab

^{2}c

Example 1:

The terms are: 4x, 9y, and -4

The constant is: -4

Example 2:

3x

^{2}y - 2xy + xy

^{2}

The terms are:3x

^{2}y, - 2xy, xy

^{2}

The constant is: there is no constant

A

**is the number that is being multiplied by a variable. Let's look at a couple of examples:**

*coefficient*- -3x the coefficient is -3
- 2 x
^{2}ythe coefficient is 2 - -xy the coefficient is -1
- abc the coefficient is the "understood" 1

**: An algebraic expression is a group of terms that is separated by addition and/or subtraction. Terms are formed by a constant, a variable, or a product of constants and variables. The coefficient is the number that is being multiplied by a variable.**

*Sum it up*
Related Links:Math algebra Positive and Negative Integer Exponents Rational (Fractional) Exponents |

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