# Root

Pronunciation: /rut/ Explain
1. A root is a number that, when it is substituted into a polynomial, makes the polynomial equal to zero. Example: 2 is a root of x2x – 2 since 22 – 2 – 2 = 4 – 2 – 2 = 0. For more information see Roots of a Polynomial.
2. A root is a number or expression with a fractional exponent. Examples: , .

Definition: if and only if ; if and only if .

### References

1. McAdams, David E.. All Math Words Dictionary, root. 2nd Classroom edition 20150108-4799968. pg 157. Life is a Story Problem LLC. January 8, 2015. Buy the book

McAdams, David E. Root. 5/2/2019. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/r/root.html.

### Revision History

5/2/2019: Changed equations and expressions to new format. (McAdams, David E.)
12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
12/5/2018: Removed broken links, updated license, implemented new markup. (McAdams, David E.)
8/7/2018: Changed vocabulary links to WORDLINK format. (McAdams, David E.)
5/5/2011: Initial version. (McAdams, David E.)

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