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anonymous

  • 5 years ago

how can I solve this problem? sqrt(2x) +4=x

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  1. myininaya
    • 5 years ago
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    get the sqrt by itself and then square both sides

  2. anonymous
    • 5 years ago
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    yeah, that seems the only way

  3. anonymous
    • 5 years ago
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    and then use the root formula

  4. myininaya
    • 5 years ago
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    sqrt(2x)=x-4 2x=(x-4)^2 2x=x^2-8x+16 x^2-8x-2x+16=0 x^2-10x+16=0

  5. anonymous
    • 5 years ago
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    darn, beat me to it yeah, jk about the formula

  6. radar
    • 5 years ago
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    (x-8)(x-2)=0

  7. anonymous
    • 5 years ago
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    thank you!

  8. radar
    • 5 years ago
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    x=8 x=2

  9. radar
    • 5 years ago
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    Check out the 2 as it may not work.

  10. myininaya
    • 5 years ago
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    if you ever have sqrts in your problem, get rid of them by getting just one sqrt on one side of the equation and square both sides to get rid of it. the process will be continued if you have more than one

  11. myininaya
    • 5 years ago
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    yes always check the x's that you get whenever you raise both sides to an even power which we did to get rid of the sqrt

  12. radar
    • 5 years ago
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    With 2 you are using the negative root.

  13. radar
    • 5 years ago
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    So I guess it is o.k, true you will lose negative sign when squaring so try and keep track.

  14. myininaya
    • 5 years ago
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    x=2 will not work since sqrt(4) does not equal -2

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