Các bạn làm cho mk câu 11

Question

Các bạn làm cho mk câu 11
cac-ban-lam-cho-mk-cau-11

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Sapo 1 year 2020-10-14T01:52:34+00:00 2 Answers 95 views 0

Answers ( )

  1. Jezebel
    0
    2020-10-14T01:53:43+00:00
    Reply

    $11)_{}$ $2x.(2x-1)^2-3x.(x+3)(x-3)-4x.(x+1)^2_{}$

    $=2x.(4x^2-4x+1)-3x.(x^2-9)-4x.(x^2+2x+1)_{}$

    $=8x^3-8x^2+2x-3x^3+27x-4x^3-8x^2-4x_{}$

    $=x^3-16x^2+25x_{}$

  2. Neala
    0
    2020-10-14T01:53:56+00:00
    Reply

    Đáp án:

     `2x(2x-1)^2-3x(x+3)(x-3)-4x(x+1)^2`

    `=2x(4x^2-4x+1)-3x(x^2-9)-4x(x^2+2x+1)`

    `=8x^3-8x^2+2x-3x^3+27x-4x^3-8x^2-4x`

    `=x^3-16x^2+25x`

     

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