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

Toán Lớp 8: phân tích thành nhân tử: x^2+xy-x-y

Toán Lớp 8: phân tích thành nhân tử:
x^2+xy-x-y

Comments ( 2 )

  1. Answer
    x^{2} + xy – x – y
    = (x^{2} + xy) + (-x – y)
    = x . (x + y) – (x + y)
    = (x – 1) . (x + y)

  2. x^2+xy-x-y
    =(x^2-xy)+(-x-y)
    =x(x+y)-(x+y)
    =(x+y)(x-1)
    #owen
     

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