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

Toán Lớp 8: nhân tử chung 12.x.y^2-12.x.y+3.x

Toán Lớp 8: nhân tử chung
12.x.y^2-12.x.y+3.x

Comments ( 2 )

  1. 12xy^2-12xy+3x
    =3x(4y^2-4y+1)
    =3x[(2y)^2-2.2y+1]
    =3x(2y-1)^2

  2. Các bước giải:
    12xy²-12xy+3x=3x(4y²-4y+1)=3x(2y-1)²
     

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

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