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Surds homework

  1. Jun 22, 2013 #1
    1. The problem statement, all variables and given/known data
    Get the value of a if
    [itex]\sqrt{6-\sqrt{a}}[/itex]+[itex]\sqrt{6+\sqrt{a}}[/itex]=[itex]\sqrt{14}[/itex]


    3. The attempt at a solution
    nothing succesfull
    Feel free to move this thread,..I actually place it here to tap more brains
     
  2. jcsd
  3. Jun 22, 2013 #2

    tiny-tim

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    square? :wink:
     
  4. Jun 22, 2013 #3
    What do you mean?I square both sides?
     
  5. Jun 22, 2013 #4

    tiny-tim

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    square as many sides as you can find! :biggrin:
     
  6. Jun 22, 2013 #5
    It gives me this:
    12+[itex]\sqrt{36-a}[/itex]=14
    could I be going wrong somewhere?
     
  7. Jun 22, 2013 #6
    Damn it I had never felt so foolish,..thanks I got it
     
  8. Jun 22, 2013 #7

    Nugso

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    (a+b)² = a² + 2ab + b²

    Nevermind. You've already gotten it!
     
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