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# 9.3: Simplification of Radical Expressions

Difficulty Level: At Grade Created by: CK-12
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### Vocabulary Language: English

Perfect Square

Perfect Square

A perfect square is a number whose square root is an integer.

The $\sqrt{}$, or square root, sign.

A radical expression is an expression with numbers, operations and radicals in it.
Rationalize the denominator

Rationalize the denominator

To rationalize the denominator means to rewrite the fraction so that the denominator no longer contains a radical.
Square Number

Square Number

A square number or perfect square is a whole number that is the square of another integer. For example, 36 is a square number because $6 \cdot 6 = 36$.
Variable Expression

Variable Expression

A variable expression is a mathematical phrase that contains at least one variable or unknown quantity.

Dec 21, 2012

Jan 26, 2016