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

Toán Lớp 8: 2(x+1)|x-4|=0 .

Tháng Hai 13, 2023 Toán học 2 Comments 0 views

Toán Lớp 8: 2(x+1)|x-4|=0 .

Comments ( 2 )

  1. danvanthu
    danvanthu
    13 Tháng Hai, 2023 at 11:31 chiều
    Reply
    2 ( x + 1 ) | x – 4 | = 0
    ⇔ \(\left[ \begin{array}{l}2 ( x + 1 ) = 0\\| x – 4 | = 0\end{array} \right.\) 
    ⇔ \(\left[ \begin{array}{l}x + 1 = 2\\x – 4 = 0\end{array} \right.\) 
    ⇔ \(\left[ \begin{array}{l}x = – 1\\x = 4\end{array} \right.\)
    Vậy , x ∈ { – 1 ; 4 } .

  2. dananhthumai
    dananhthumai
    13 Tháng Hai, 2023 at 11:30 chiều
    Reply
    2(x+1) |x-4| =0
    ⇔ (2x+2) |x-4| =0
    $\text {⇔ \(\left[ \begin{array}{l}2x+2 =0\\x-4 =0\end{array} \right.\) }$
    $\text {⇔\(\left[ \begin{array}{l}x=-1\\x=4\end{array} \right.\) }$
    $\text {Vậy x= -1 hoặc x= 4}$
    $\text {@lamtung2007}$
     

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

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