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

Toán Lớp 6: Tìm n để n^3+n^2+n-3 là số nguyên tố

Toán Lớp 6: Tìm n để n^3+n^2+n-3 là số nguyên tố

Comments ( 1 )

  1. ????3+????2+????−3
    =????^3+????^2+????-3
    =????^3+2????^2+3????−1????^2−2????−3
    =????(????^2+2????+3)−1(????^2+2????+3)
    = (????−1)(????^2+2????+3)
    =>(????−1)(????2+2????+3)

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

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