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

Toán Lớp 8: x(x+2015)-x-2015=0 giúp mk vs ạ

Home/ Toán Lớp 8: x(x+2015)-x-2015=0 giúp mk vs ạ

Toán Lớp 8: x(x+2015)-x-2015=0 giúp mk vs ạ

Tháng Tư 15, 2022 Toán học 2 Comments 0 views

Toán Lớp 8: x(x+2015)-x-2015=0 giúp mk vs ạ

Comments ( 2 )

  1. thuminhthong
    thuminhthong
    15 Tháng Tư, 2022 at 2:38 sáng
    Reply
    \text{Ta có: x.(x+2015)-x-2015=0}
    ⇒\text{x.(x+2015)-(x+2015)=0}
    ⇒\text{(x+2015).(x-1)=0}
    ⇒\(\left[ \begin{array}{l}x+2015=0\\x-1=0\end{array} \right.\) 
    ⇒\(\left[ \begin{array}{l}x=-2015\\x=1\end{array} \right.\) 
    \text{KL:Vậy:} \(\left[ \begin{array}{l}x=-2015\\x=1\end{array} \right.\) 
    __________________________________
    \text{#mct}

  2. quynhthanhnghi
    quynhthanhnghi
    15 Tháng Tư, 2022 at 2:38 sáng
    Reply

    x(x+2015)-x-2015=0
    x(x+2015)-(x+2015)=0
    (x+2015)(x-1)
    TH1: x+2015=0 x= -2015
    TH2: x-1=0 x=1
    Vậy S { 2015;1}

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

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