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Root

A solution to an equation of the form f(x) = 0. Roots may be real or complex.

Note: The roots of f(x) = 0 are the same as the zeros of the function f(x). Sometimes in casual usage the words root and zero are used interchangeably.

 

Example:
The roots of x2x – 2 = 0 are x = 2 and x = –1.
The equation is satisfied if we substitute either x = 2 or x = –1 into the equation.

 


  this page updated 21-feb-16
Mathwords: Terms and Formulas from Algebra I to Calculus
written, illustrated, and webmastered by Bruce Simmons
NCTM Web Bytes December 2004 Web Bytes March 2005 Web Bytes