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I Equation with surds

  1. Apr 18, 2017 #1

    dyn

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    Hi.
    This is not a homework question but I saw this equation on an advert for a website.

    (x+15)1/2 + x1/2 = 15

    I tried squaring both sides of the equation but that didn't help. Can this equation be solved exactly or can it only be solved by iteration ?
    Thanks
     
  2. jcsd
  3. Apr 18, 2017 #2

    mfb

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    2016 Award

    Staff: Mentor

    Try isolating one square root (##\sqrt {...} = ...##) before squaring, afterwards it should be clear how to solve for x.
     
  4. Apr 18, 2017 #3

    dyn

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    Thanks for your help. Got the answer now
     
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