|x^2+|6x-2||=x^2+4 giúp mik với

Question

|x^2+|6x-2||=x^2+4 giúp mik với

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Khải Quang 5 years 2021-04-17T02:45:38+00:00 2 Answers 52 views 0

Answers ( )

  1. quangkhai
    0
    2021-04-17T02:47:07+00:00
    Reply

    Mình giúp
    2-6-2-2-4-giup-mik-voi

  2. lethu
    0
    2021-04-17T02:47:34+00:00
    Reply

    `|x^2 +|6x-2||= x^2+4`

    `= x^2 + | 6x – 2| = x^2 + 4`

    `= |6x – 2| = x^2 + 4 x^2`

    `= |6x – 2| = (x^2 – x^2) + 4`

    `= |6x -2 | = 4`

    $\Rightarrow\left[{}\begin{matrix}6x-2=4\\6x-2=-4\end{matrix}\right.$

    $\Rightarrow\left[{}\begin{matrix}6x=6\\6x=-2\end{matrix}\right.$

    $\Rightarrow\left[{}\begin{matrix}x=1\\x=\dfrac{-1}{3}\end{matrix}\right.$

    `\text{Vậy x =1;}` `\text{x =}` `-1/3`

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