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

Toán Lớp 6: (2x-4)(5x-15) =0 Mong giúp mik vớ ạ mik sẽ cho 5 sao nhanh lên ạ

Toán Lớp 6: (2x-4)(5x-15) =0
Mong giúp mik vớ ạ mik sẽ cho 5 sao nhanh lên ạ

Comments ( 2 )

  1. (2x-4)(5x-15)=0
    =>\(\left[ \begin{array}{l}2x-4=0\\5x-15=0\end{array} \right.\) 
    =>\(\left[ \begin{array}{l}2x=4\\5x=15\end{array} \right.\) 
    =>\(\left[ \begin{array}{l}x=2\\x=3\end{array} \right.\) 
    Vậy…

  2. (2x – 4)(5x – 15) = 0
    ⇒\(\left[ \begin{array}{l}2x – 4 = 0\\5x – 15 = 0\end{array} \right.\) 
    ⇒ \(\left[ \begin{array}{l}2x=4\\5x=15\end{array} \right.\) 
    ⇒\(\left[ \begin{array}{l}x=2\\x=3\end{array} \right.\) 
    Vậy x ∈ { 2 ; 3 }
     

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