ĐKXĐ : \(x\ne\pm2\)
PT \(\Leftrightarrow\dfrac{\left(x+1\right)\left(x+2\right)}{x^2-4}=\dfrac{1}{x^2-4}\)
\(\Leftrightarrow\left(x+1\right)\left(x+2\right)=1\)
\(\Leftrightarrow x^2+x+2x+2-1=0\)
\(\Leftrightarrow x^2+3x+1=0\)
\(\Leftrightarrow x=\dfrac{-3\pm\sqrt{5}}{2}\left(TM\right)\)
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