Download 1.2 – Evaluate and Simplify Algebraic Expressions

1.2 – Evaluate and Simplify Algebraic
Expressions
A numerical expression consists of numbers,
operations, and grouping symbols. An
expression formed by repeated multiplication of
the same factor is a power.
A power has two parts: an exponent and a base.
The exponent represents the number of times the
base is used as a factor.
73 = 7 x 7 x 7
1.2 – Evaluate and Simplify Algebraic
Expressions
A variable is a letter that is used to represent one
or more numbers. An expression involving
variables is called an algebraic expression.
1.2 – Evaluate and Simplify Algebraic
Expressions
In an expression that can be written as a sum, the
parts added together are called terms.
A term that has a variable part is called a variable
term. A term that has no variable part is called a
constant term.
When a term is a product of a number and a
power of a variable, the number is called the
coefficient of the power.
1.2 – Evaluate and Simplify Algebraic
Expressions
An expression is simplified if it contains no
grouping symbols and all like terms are
combined. Like terms are terms that have the
same variable parts.
1.2 – Evaluate and Simplify Algebraic
Expressions
Two algebraic expressions are equivalent
expressions if they have the same value for all
values of their variable(s).