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

Toán Lớp 8: Thực hiện phép tính (10y + 1)(3x – 6y)

Toán Lớp 8: Thực hiện phép tính (10y + 1)(3x – 6y)

Comments ( 2 )

  1. $\text{10????(3????−6????)+1(3????−6????)}$
    $\text{10????(3????−6????)+1(3????−6????)}$
    $\text{30????????−60????2+1(3????−6????)}$
    $\text{30????????−60????2+1(3????−6????)}$
    $\text{30????????−60????2+3????−6????}$
    $\text{30????????−60????2+3????−6????}$

  2. Thực hiện phép tính:
    (10y+1)(3x-6y)
    =10y.3x+10y.(-6y)+1.3x+1.(-6y)
    =30xy+(-60y^2)+3x+(-6y)
    =30xy-60y^2+3x-6y
    =-60y^2+30xy+3x-6y.

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

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