对齐和案例问题

Question

我正在尝试将我的案例与对齐环境中的其他行对齐，但到目前为止还没有成功。你能告诉我如何对齐所有这些行吗：

这是我的代码：

\documentclass[11pt]{article}


\usepackage[framemethod=default]{mdframed}
\usepackage{mathtools}
\usepackage[most]{tcolorbox}
\tcbset{myformula/.style={
  arc=0pt,
  outer arc=0pt,
  colback=blue!10,
  colframe=green,
  boxrule=0.8pt,
  left=2pt,
  right=2pt,
  highlight math style={
    arc=0pt,
    outer arc=0pt,
    colback=green,
    colframe=red.
    }
  }
}



\begin{document}

\begin{tcolorbox}[ams align, myformula]
Q(z) & =  a_{n}z^{n} + a_{n-1}z^{n-1} + \dots + a_{2}z^{2} + a_{1}z^{1} + a_{0} = 0
\intertext{The conditions for stability are}\\
Q(1) & >  0
\intertext{and:}
\begin{dcases}
Q(-1) & >  0 \quad \text{if $n$ is even}\\
Q(-1) & <  0\quad \text{if $n$ is odd}
\end{dcases}
\end{tcolorbox}

\end{document}

Answer 1

\begin{tcolorbox}[ams align, myformula]
    & Q(z) =  a_{n}z^{n} + a_{n-1}z^{n-1} + \dots + a_{2}z^{2} + a_{1}z^{1} + a_{0} = 
    0
    \intertext{The conditions for stability are}
    & Q(1) >  0
    \intertext{and:}
    & \begin{dcases}
        Q(-1) & >  0 \quad \text{if $n$ is even}\\
        Q(-1) & <  0\quad \text{if $n$ is odd}
    \end{dcases}
\end{tcolorbox}

Answer 2

嗯，不是那么轻微的（:-）改进赫伯特的回答：

\documentclass[11pt]{article}


\usepackage[framemethod=default]{mdframed}
\usepackage{mathtools}
\usepackage[most]{tcolorbox}
\tcbset{myformula/.style={
  arc=0pt,
  outer arc=0pt,
  colback=blue!10,
  colframe=green,
  boxrule=0.8pt,
  left=2pt,
  right=2pt,
  highlight math style={
    arc=0pt,
    outer arc=0pt,
    colback=green,
    colframe=red.
    }
  }
}



\begin{document}

\begin{tcolorbox}[ams align, myformula]
    & Q(z) = a_{n}z^{n} + a_{n-1}z^{n-1} + \dots + a_{2}z^{2} + a_{1}z^{1} + a_{0} 
        = 0
    \intertext{The conditions for stability are}
    & Q(1) >  0
    \intertext{and:}
    & \begin{dcases*}
        Q(-1) > 0, & if $n$ is even;\\
        Q(-1) < 0, & if $n$ is odd.
    \end{dcases*}
\end{tcolorbox}
\end{document}

输出为：