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

Toán Lớp 8: Phân tích nhân tử 3x^2y-12x^3y^2 2x^2(x-y)-4xy(x-y) 4x^2-16

Toán Lớp 8: Phân tích nhân tử
3x^2y-12x^3y^2
2x^2(x-y)-4xy(x-y)
4x^2-16

Comments ( 2 )

  1. 3x^2y-12x^3y^2
    =3x^2y(1-4xy)
    b,
    2x^2(x-y)-4xy(x-y)
    =(x-y)(2x^2-4xy)
    =(x-y)2x(x-2y)
    c,
    4x^2-16
    =(2x)^2-4^2
    =(2x-4)(2x+4)
    =4(x-2)(x+2)
     

  2. #laviken#
    3x^2y-12x^3y^2
    =3x^2y(1-4xy)
    2x^2(x-y)-4xy(x-y)
    =(x-y)(2x^2-4xy)
    =(x-y)2x(x-2y)
    4x^2-16
    =4x^2-4^2
    =(2x+4)(2x-4)
    =2(x+2)(x-2)
     

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

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