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

Toán Lớp 8: giải hộ mk vs ạ : (8x+2).(1-3x)

Toán Lớp 8: giải hộ mk vs ạ : (8x+2).(1-3x)

Comments ( 2 )

  1. (8x+2)(1-3x)
    =1.(8x+2)-3x(8x+2)
    =8x+2-24x^2-6x
    =-24x^2+(8x-6x)+2
    =-24x^2+2x+2 

  2. (8x+2)(1-3x)
    =(8x.1)-(8x.3x)+(2.1)-(2.3x)
    =8x-24x^2+2-6x
    =-24x^2+2x+2
     

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

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