|x-(2)/(7) -(5)/(5) =0

Question

|x-(2)/(7) -(5)/(5) =0

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Khải Quang 4 years 2020-10-13T17:48:34+00:00 2 Answers 92 views 0

Answers ( )

  1. Edana
    0
    2020-10-13T17:49:42+00:00
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    `Ix.2/7.0`

    `Ix-2/7-1=0`

    `Ix-2/7I=0+1`

    `Ix-2/7I=1`

    `x-2/7=1`

    hoặc `x-2/7=-1`

    x=`1+2/7`

    hoặc `x= -1+2/7`

    `x=9/7`

    hoặc `x=-57`

     

  2. Nho
    0
    2020-10-13T17:49:45+00:00
    Reply

    Giải thích các bước giải:

    Ix-$\dfrac{2}{7}$I-$\dfrac{5}{5}$=0

    Ix-$\dfrac{2}{7}$I-1=0

    Ix-$\dfrac{2}{7}$I=0+1

    Ix-$\dfrac{2}{7}$I=1

    x-$\dfrac{2}{7}$=1 hoặc x-$\dfrac{2}{7}$=-1

    x=1+$\dfrac{2}{7}$  hoặc x=-1+$\dfrac{2}{7}$

    x=$\dfrac{9}{7}$     hoặc x=$\dfrac{-5}{7}$

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