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

Toán Lớp 8: mk nha mn ơi, cảm ơn 3x(2x-1)-24x+12=0

Toán Lớp 8: mk nha mn ơi, cảm ơn
3x(2x-1)-24x+12=0

Comments ( 2 )

  1. Đáp án:
     
    Giải thích các bước giải:
     

    toan-lop-8-mk-nha-mn-oi-cam-on-3-2-1-24-12-0

  2. 3x(2x-1)-24x+12=0
    <=>3x(2x-1)-(24x-12)=0
    <=>3x(2x-1)-12(2x-1)=0
    <=>(3x-12)(2x-1)=0
    <=>[(3x-12=0),(2x-1=0):}
    <=>[(3x=12),(2x=1):}
    <=>$\left[\begin{matrix} x=4\\ x=\dfrac{1}{2}\end{matrix}\right.$
    Vậy x=4 hoặc x=1/2

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

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