Multiplicity

Returns the multiplicity of a root. An element $a$ is said to be a root of multiplicity $k$ of $p\left(x\right)$ if $p\left(x\right)=(x-a{)}^{k}q(x)$; where $q\left(a\right)\ne 0$. If $a$ is not a root, its multiplicity is zero.

multiplicity(List, Polynomial)

Description

Given a list with the root and a polynomial, returns its multiplicity.