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

Toán Lớp 8: Làm tính nhân -3x( 7 x ^2 – 5 x + 2)

Toán Lớp 8: Làm tính nhân -3x( 7 x ^2 – 5 x + 2)

Comments ( 2 )

  1. -3x(7x^2-5x+2)
    =-3x.7x^2+3x.5x-3x.2
    =-21x^3+15x^2-6x
    #owen  
    $ @H $
     

  2. -3x(7x² – 5x + 2)
    =-3x . 7x² + 3x . 5x – 3x.2
    =-21x³ + 15x² – 6x

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

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