Norm 2

If $p\left(x\right)=\sum _{k=0}^n{a}_k{x}^k$ is a polynomial, its 2-norm is defined as ${||p||}_2=\sqrt{\sum _{k=0}^n{\left|a_k\right|}^2}$

norm_2(Polynomial)

Description

Given a polynomial, returns its 2-norm.