Wiki Math

An interesting and some what related to the Factor Theorem.
http://en.wikipedia.org/wiki/X-intercept

Even Odd function:  http://en.wikipedia.org/wiki/Even_function#Even_functions

Function Composition:  http://en.wikipedia.org/wiki/Function_composition

Logarithm:  http://en.wikipedia.org/wiki/Logarithm

Fundamental Theorem of Algebra:  http://en.wikipedia.org/wiki/Fundamental_theorem_of_algebra
Carl Friedrich Gauss was one of the contributor to the theory.

http://en.wikipedia.org/wiki/Root_of_a_function