5x +3ax-3ay-5y+6 tại x-y =0

Question

5x +3ax-3ay-5y+6 tại x-y =0

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Diễm Kiều 5 years 2021-05-23T22:10:46+00:00 2 Answers 20 views 0

Answers ( )

  1. thuhuong
    0
    2021-05-23T22:12:21+00:00
    Reply

    Đáp án:

    `6` 

    Giải thích các bước giải:

    $\rm 5x+3ax-3ay-5y+6$

    $\rm =(5x-5y)+(3ax-3ay)+6$

    $\rm =5.(x-y)+3a.(x-y)+6$

    $\rm =5.0+3a.0+6$

    $\rm =0+0+6=6$ 

  2. mocmien2
    0
    2021-05-23T22:12:36+00:00
    Reply

    Tham khảo

    ` 5x+3ax-3ay-5y+6`

    `=5(x-y)+3a(x-y)+6`

    `=(x-y)(5+3a)+6`

    `=0.(5+3a)+6`

    `=0+6=6`

    `\text{©CBT}`

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