Phân tích đa thức thành nhân tử 1) 10x² (x – y) + 15x³ (y – z) 2) 1 – 12xy + 36²y²

Question

Phân tích đa thức thành nhân tử
1) 10x² (x – y) + 15x³ (y – z)
2) 1 – 12xy + 36²y²

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Sapo 6 years 2020-10-24T08:42:55+00:00 2 Answers 98 views 0

Answers ( )

  1. Vodka
    0
    2020-10-24T08:44:04+00:00
    Reply

    1, 10x^2(x-y)+15x^3(y-z)

    10x^2(x-y)-15x^3(x-y)

    =(10x^2-15x^3)(x-y)

    2, 1-12xy+36x^2y^2

    =1^2-2*1*6xy+(6xy)^2

    =(1-6xy)^2

    Study well

     

  2. Ben
    0
    2020-10-24T08:44:23+00:00
    Reply

    1) `10x^2(x-y)+15x^3(y-z)`

    `=10x^2(x-y)-15x^3(x-y)`

    `=5x^2(x-y)(2-3x)`

    2) `1-12xy+36x^2y^2`

    `=(6xy)^2-6xy.2+1^2`

    `=(6xy-1)^2`

     

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