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

Toán Lớp 8: tìm x biết : 2x ( x + 3 ) – 4x – 12 = 0 giải giúp vs camon ạ

Toán Lớp 8: tìm x biết : 2x ( x + 3 ) – 4x – 12 = 0
giải giúp vs camon ạ

Comments ( 2 )

  1. chúc bn hc tôtr vote mk 5* và ctlhn nhé

    toan-lop-8-tim-biet-2-3-4-12-0-giai-giup-vs-camon-a

  2. y10000 
    2x . ( x + 3 ) – 4x – 12 = 0
    <=> 2x . ( x + 3 ) – 4 . ( x + 3 ) = 0
    <=> ( 2x – 4 ) . ( x + 3 ) = 0
    <=> \(\left[ \begin{array}{l}2x-4=0\\x+3=0\end{array} \right.\) 
    <=> \(\left[ \begin{array}{l}x=2\\x=-3\end{array} \right.\) 
    $\text{Vậy}$ \(\left[ \begin{array}{l}x=2\\x=-3\end{array} \right.\)  
     

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

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