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Radicals Review
Radical Definitions for Radical words
10
Mathematics
9th Grade
12/15/2015

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Term
Radicand
Definition
The number under the radical symbol
Term
Index
Definition
The little number above the radical. Defines the root you're taking
Term
Rationalizing the Denominator
Definition
Since you cannot have a radical in the denominator you must multiply the numerator and denominator by the conjugate of the denominator. This will cancel the bottom radical.
Term
Conjugate
Definition
It negates the second term in a binomial, only use if a radical is in the denominator.
Term
Extraneous root
Definition
Example: you have an equation and after some work come up with two roots (where it equals zero) "a" and "b". When you put "a" into the original equation it becomes zero, but when you put in "b" it doesn't. So "b" is an extraneous root.
Term
Parent Funtion
Definition
f(x)=√x
Term
Vertical Stretch
Definition
When the absolute value of A is greater than one.
Term
Vertical Compression
Definition
When the absolute value of A is less than one.
Term
Horizontal Stretch
Definition
When the absolute value of B is greater than one.
Term
Horizontal Compression
Definition
When the absolute value of B is less than one.
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