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

Toán Lớp 6: (2x+18).(x-1)=0 giải giúp em với ạ

Toán Lớp 6: (2x+18).(x-1)=0 giải giúp em với ạ

Comments ( 2 )

  1. \text{(2x + 18) (x – 1) = 0}
    \text{2 (x + 9) (x – 1) = 0}
    ⇔ \(\left[ \begin{array}{l}x + 9=0\\x – 1=0\end{array} \right.\) 
    ⇔ \(\left[ \begin{array}{l}x =-9\\x =1\end{array} \right.\) 
                                \text{Vậy x ∈ {-9; 1}}

  2. $\text{( 2 x + 18 ). ( x – 1) = 0}$
    $\text{2 ( x + 9 ) ( x- 1) = 0}$
    ⇔$\left[\begin{matrix} x + 9 = 0\\ x – 1 = 0 \end{matrix}\right.$
    ⇔$\left[\begin{matrix}x = -9\\x= 1\end{matrix}\right.$
    $\text{Xin hay nhất ạ*}$

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