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

Toán Lớp 8: Rút gọn phân thức : x mũ 3 -x mũ 2 -x + 1 / 1 -x mũ 3

Toán Lớp 8: Rút gọn phân thức :
x mũ 3 -x mũ 2 -x + 1 / 1 -x mũ 3

Comments ( 1 )

  1. =x^2(x-1)-(x-1)/ -(x^3-1)
    =(x-1)(x+1)(x-1)/-(x-1)(x^2+x+1)
    =(x-1)(x+1)/-(x^2+x+1)

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