Until the end of part A, we assume that all roots of $p$ are stable and have multiplicity 1. Justify that there exists $\lambda \in \{-1, 1\}$ such that $p = \lambda p_0$.
Until the end of part A, we assume that all roots of $p$ are stable and have multiplicity 1.
Justify that there exists $\lambda \in \{-1, 1\}$ such that $p = \lambda p_0$.