\(Bpt\Leftrightarrow\dfrac{1}{x+2}-\dfrac{1}{x-5}>0\)
\(\Leftrightarrow\dfrac{x-5-x-2}{\left(x+2\right)\left(x-5\right)}>0\)
\(\Leftrightarrow\dfrac{-7}{\left(x+2\right)\left(x-5\right)}>0\)
\(\Leftrightarrow\left(x+2\right)\left(x-5\right)< 0\)
Vì x+2 > x -5
=> x+2>0 và x-5<0
=> -2 < x < 5
Vậy -2 < x < 5