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

Toán Lớp 8: x ( x + 2y ) – y ( 2x – 1) – x^2

Toán Lớp 8: x ( x + 2y ) – y ( 2x – 1) – x^2

Comments ( 2 )

  1. Lời giải và giải thích chi tiết:
    x(x+2y)-y(2x-1)-x^2
    =x^2+2xy-2xy+y-x^2
    =y 

  2. $x ( x + 2y ) – y ( 2x – 1) – x^2$
    $=x^2 + 2xy – 2yx +y – x^2$
    $=y $

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

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