Algebraic Expressions

Variable: the letter that represents an unknown number.

Coefficient: number in front of the variable. ​

Constant: a number that has no variable and is added or subtracted in the expression. ​

Terms: parts of the expression seperated by + and -signs. ​

Parts of the Algebraic Expression:

A mathematical phrase that contains numbers, letters, and operations.

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Example: 3x + 4z - 12​

​Algebraic Expression

The number of terms in an expression can be one or greater.

What is the relationship between a coefficient and a variable?

3x

Coefficient: 3

Variable: x

• When a number and a variable are directly next to each other the operation is multiplication.

• The coefficient tells you how many of​ the variable there are:   

• ​Ex:    3b = b + b + b = 3∙b

  Ex:     6d = d + d + d + d + d + d = 6∙d​

• *Variables by themselves have a coefficient of one!

  Ex:     m = 1m = 1∙m

• When there is no number in front of the variable the number is 1.....

Subject | Subject

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