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

Toán Lớp 8: làm tính Nhân (x-3) (X mũ 2-x+1)

Toán Lớp 8: làm tính Nhân (x-3) (X mũ 2-x+1)

Comments ( 2 )

  1. (x-3)(x^2-x+1)
    =x.x^2-x.x+x.1-3.x^2+3.x-3.1
    =x^3-x^2+x-3x^2+3x-3
    =x^3-4x^2+4x-3
     

  2. (x-3).(x^2-x+1)
    =x^3-x^2+x-3x^2+3x-3
    =x^3-4x^2+4x-3
    $#chúc tus học tốt!!$
    #La
     

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