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Simple problem

  1. Feb 3, 2005 #1
    I have got stuck with this simple problem,

    x +x^1/2=6 ( x plus square root of x is equal to 6 )

    Although I know the answer is 4, I don't know how to systmatically calculate this problem. Do you know? And how?
     
  2. jcsd
  3. Feb 3, 2005 #2
    Let u = [itex]\sqrt{x}[/itex], and then you have a quadratic in u.

    --J
     
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