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

Toán Lớp 8: 12x^2-8x+32=12x^2 (giải chi tiết)

Toán Lớp 8: 12x^2-8x+32=12x^2 (giải chi tiết)

Comments ( 2 )

  1. 12x^2-8x+32=12x^2
    <=>12x^2-8x+32-12x^2=0
    <=>(12x^2-12x^2)-8x+32=0
    <=>-8x+32=0
    <=>-8x=-32
    <=>x=4
    Vậy x=4
     

  2. Giải đáp:
     $a) 12x²-8x+32=12x²$
    $⇔ 12x²-8x+32-12x²=0$
    $⇔ (12x²-12x²)-8x+32=0$
    $⇔ -8x+32=0$
    $⇔ -8x=-32$
    $⇔ x=(-32):(-8)$
    $⇔ x=4$
    $Vậy$ $x=4$
     $\text{#BEST}$

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

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