Đáp án:
\( - 2 < m < 3\)
Giải thích các bước giải:
\(\begin{array}{l}
y < 0\\
\Leftrightarrow \dfrac{{m - 3}}{{m + 2}} < 0\\
\Leftrightarrow \left[ \begin{array}{l}
\left\{ \begin{array}{l}
m - 3 > 0\\
m + 2 < 0
\end{array} \right.\\
\left\{ \begin{array}{l}
m - 3 < 0\\
m + 2 > 0
\end{array} \right.
\end{array} \right. \Leftrightarrow \left[ \begin{array}{l}
\left\{ \begin{array}{l}
m > 3\\
m < - 2
\end{array} \right.\left( l \right)\\
\left\{ \begin{array}{l}
m < 3\\
m > - 2
\end{array} \right.
\end{array} \right.\\
KL: - 2 < m < 3
\end{array}\)
