2.1
1
Unit 1
–
Lesson 4
2.1
Algebraic Expressions
Variable:
A letter that represents one or more numbers
ex
in the expression
2
x
+ 3
, the variable is
ex
in the expression
2
xy
, the variables are
and
Constant:
The
numerical part(s) of an algebraic expression
ex
in the expression
2
x
+ 3
, the constants are
and
Constant Term:
The term that only has a number, no variables
ex
In the expression 2
x
+ 3, the
constant term is
Coefficient:
The numerical factor in front of the variable(s) in a term
ex
In the expression
x
+ 3
y
− 5
z
+ 7,
the coefficient of
x
is
the coefficient of
y
is
the coefficient of
z
is
An
algebraic
expression
consists of one or more
terms made up of variables, constants, and
operation signs.
ex
2
x
+ 3
or
3
x
‒ 5
y
+ 7
or
4
x
2
Term:
Part of an algebraic expression.
Terms are separated by “+” or “

” signs.
ex
In the expression 3
x
+ 2
y
 5, the terms are
,
and
Like Terms:
Terms with identical variables
and
identical exponents on each variable
ex
Like terms
Not like terms
Like terms
(
Note:
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Fall '05
 Kzaer
 Algebra, ex, $25.00, $1200, Monomial

Click to edit the document details