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

Toán Lớp 8: 4x²-12x=-9 tìm x giúp tui nghen

Toán Lớp 8: 4x²-12x=-9 tìm x giúp tui nghen

Comments ( 2 )

  1. 4x²-12x=-9
    ⇔ 4x² – 12x + 9 = 0
    ⇔ (2x – 3)² = 0
    ⇔ 2x – 3 = 0
    ⇔ x = 3/2

  2. #WAB
    $4x^2-12x=-9$
    $⇔ 4x^2-12x+9=0$
    $⇔(2x-3)^2=0$
    $⇔ 2x-3=0$
    $⇔ x=\dfrac32$
    Vậy $x=\dfrac32$

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

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