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

Toán Lớp 6: Tìm x: 16 . x 2 = 64 làm nhanh nha

Toán Lớp 6: Tìm x: 16 . x 2 = 64 làm nhanh nha

Comments ( 2 )

  1. 16 . x^2 = 64
    <=> x^2 = 64/16
    <=> x^2 = 16/4
    <=> x^2 = 4
    => $\left[\begin{matrix} x = 4\\ x = – 4\end{matrix}\right.$
    KL: Vậy S = {4; – 4}
    $#Ling$

  2. 16.x²=64
    ⇔x²=4
    ⇔x=4 và  x=-4
    vậy x=4 và  x= -4 

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

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