`text{Với x > 3}`
`-> (x - 3)/(x^2 - 5x + 6) > 2`
`-> 1/(x - 2) - 2 > 0`
`-> (5 - 2x)/(x - 2) > 0`
`->` \(\left[ \begin{array}{l}\left\{ \begin{array}{l}5 - 2x >0\\x - 2 >0\end{array} \right.\\\left\{ \begin{array}{l}5 - 2x < 0\\x - 2 < 0\end{array} \right.\end{array} \right.\)
`-> 2 < x < 5/2` `(loại)`
`text{Với x < 3}`
`-> (3 - x)/((x - 3)(x - 2)) > 2`
`-> -1/(x - 2) - 2 > 0`
`-> (3 - 2x)/(x - 2) > 0`
`-> 3/2 < x < 2` `(nhận)`
