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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: x – 5/x + 3 < 0 giúp mik vs ạ

Toán Lớp 7: x – 5/x + 3 < 0 giúp mik vs ạ

Comments ( 1 )

  1. $\dfrac{x-5}{x+3} < 0$
    \(⇔\left[ \begin{array}{l}\begin{cases}x-5 > 0\\x+3<0\end{cases}\\\begin{cases}x-5 < 0\\x+3>0\end{cases}\end{array} \right.\) 
    \(⇔\left[ \begin{array}{l}\begin{cases}x > 5\\x<-3\end{cases}\\\begin{cases}x < 5\\x>-3\end{cases}\end{array} \right.\) 
    $⇔ -3 < x <5$

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222-9+11+12:2*14+14 = ? ( )