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

Toán Lớp 8: Tìm x biết: (x + 2)^2 + 2(x +2) (3 – 2x) + (2x-3)^2 = 0

Toán Lớp 8: Tìm x biết:
(x + 2)^2 + 2(x +2) (3 – 2x) + (2x-3)^2 = 0

Comments ( 2 )

  1. $\\$
    Giải đáp + giải thích các bước giải :
    $(x+2)^2+2(x+2)(3-2x)+(2x-3)^2=0\\⇔(x+2)^2+2(x+2)(3-2x)+(3-2x)^2=0\\⇔(x+2+3-2x)^2=0\\⇔(-x+5)^2=0\\⇔-x+5=0\\⇔-x=-5\\⇔x=5\\\text{Vậy}x=5$

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

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