Phân tích thành nhân tử 3x^2 – 3y^2 – 12x + 12y

Question

Phân tích thành nhân tử
3x^2 – 3y^2 – 12x + 12y

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Alaia 1 tuần 2021-12-07T18:41:50+00:00 2 Answers 3 views 0

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  1. maianhtu
    0
    2021-12-07T18:43:05+00:00
    Reply

    `3x^2 – 3y^2 – 12x + 12y`

    `= ( 3x^2 – 3y^2 ) – (12x – 12y)`

    `= 3( x^2 – y^2) – 12( x – y)`

    `= 3 ( x – y) ( x + y) – 12( x – y)`

    `= 3( x + y – 4) . ( x – y)`

     

  3. uyenthu
    0
    2021-12-07T18:43:17+00:00
    Reply

    `3x^2-3y^2-12x+12y`

    `=(3x^2-3y^2)-(12x-12y)`

    `=3(x^2-y^2)-12(x-y)`

    `=3(x-y)(x+y)-12(x-y)`

    `=3(x-y)(x+y-4)`

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