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

Toán Lớp 6: (x+3)×(2x-4)=0 Mn giải giúp em vs ạ

Toán Lớp 6: (x+3)×(2x-4)=0
Mn giải giúp em vs ạ

Comments ( 2 )

  1. $\text{(x + 3) × (2x – 4) = 0}$
    $\text{⇒ x + 3 = 0 hoặc 2x – 4 = 0}$
    $\text{TH1: x + 3 = 0}$
    $\text{x = -3}$
    $\text{TH2: 2x – 4 = 0}$
    $\text{2x = 4}$
    $\text{x = 2}$
    $\text{Vậy x ∈ {-3; 2}}$
    $\textit{Ha1zzz}$
     

  2. ( x +3 ) . ( 2x – 4 ) = 0
    ⇔ $\left[\begin{matrix} x+3=0\\ 2x-4=0\end{matrix}\right.$
    ⇔ $\left[\begin{matrix} x= -3\\ 2x = 4\end{matrix}\right.$
    ⇔ $\left[\begin{matrix} x=-3\\ x=2\end{matrix}\right.$
    Vậy x ∈ { -3 ; 2 }

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