1. Sep 12, 2012 #1

   nukeman

   

   1. The problem statement, all variables and given/known data
   
   The image has the question I don't quite understand!
   
   
   
   
   2. Relevant equations
   
   
   
   3. The attempt at a solution
   
   I understand how to get √(√2 - x) but I dont get how they end up with: 4√2 - x
   
   ?

    

   Last edited: Sep 12, 2012

   nukeman, Sep 12, 2012
2. 
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3. Sep 12, 2012 #2

   Mark44

   

   Insights Author

   Staff: Mentor

   Your notation is incorrect. This is what you wrote:
   $$ \sqrt{\sqrt{2} - x}$$
   
   What you should have written is
   $$ \sqrt{\sqrt{2-x}}$$
   
   Without using LaTeX, as I did, you could have written √(√(2 - x))
   
   Do you see the difference?

    

   Mark44, Sep 12, 2012
4. Sep 12, 2012 #3

   nukeman

   

   Ah yea, I see the difference. Gotta start writing in latex!
   
   I still dont understand the problem as I pointed out in the picture. ?

    

   nukeman, Sep 12, 2012
5. Sep 12, 2012 #4

   Mark44

   

   Insights Author

   Staff: Mentor

   Write the expression in exponent form rather than radical form.

    

   Mark44, Sep 12, 2012

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