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

Toán Lớp 7: PTĐTTNT: $x^{2}$ – 2xy – 5x + 10y

Toán Lớp 7: PTĐTTNT: $x^{2}$ – 2xy – 5x + 10y

Comments ( 2 )

  1. Giải đáp:
     
    Lời giải và giải thích chi tiết:
     x^2 – 2xy – 5x + 10y
    = (x^2 – 2xy) – (5x – 10y)
    = x(x – 2y) – 5 (x – 2y)
    = (x – 5)(x – 2y)

  2. x^2  – 2xy – 5x + 10y
    = x(x – 5) – 2y(x – 5)
    = (x – 2y)(x – 5)

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

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