\(3n-2⋮n+3\)
Mà \(n+3⋮n+3\)
\(\Leftrightarrow\left\{{}\begin{matrix}3n-2⋮n+3\\3n+9⋮n+3\end{matrix}\right.\)
\(\Leftrightarrow11⋮n+3\)
\(\Leftrightarrow n+3\inƯ\left(11\right)\)
\(\Leftrightarrow\left[{}\begin{matrix}n+3=1\\n+3=11\\n+3=-1\\n+3=-11\end{matrix}\right.\) \(\Leftrightarrow\left[{}\begin{matrix}n=-2\\n=8\\n=-4\\n=-14\end{matrix}\right.\)
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