x . ( x – 2) – x² = 0

Question

x . ( x – 2) – x² = 0

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Hưng Gia 4 years 2020-10-14T14:51:42+00:00 2 Answers 197 views 0

Answers ( )

  1. minhkhoi
    0
    2020-10-14T14:52:58+00:00
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    $x(x-2)-x^2=0$

    $⇔x^2-2x-x^2=0$

    $⇔-2x=0$

    $⇔x=0$

    $\text{Vậy $x=0$}$

     

  2. Giakhanh
    0
    2020-10-14T14:53:07+00:00
    Reply

    Đáp án:  `S = { 0 }` 

    Giải thích các bước giải:

    `x . (x – 2) – x^2 = 0`

    `⇒ x . (x – 2 – x) = 0`

    `⇒ x . 2 = 0`

    `⇒ x = 0`

    Vậy `S = { 0 }`

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )