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Homework Help: Deriving using chain rule

  1. Nov 11, 2008 #1
    1. The problem statement, all variables and given/known data
    2x^2+5xy-y^2=1


    2. Relevant equations
    d/dx(f(u)x))=df/du * du/dx


    3. The attempt at a solution

    i got (2y-4x)/5x but i'm almost certain that its wrong......can anyone help me?
     
  2. jcsd
  3. Nov 11, 2008 #2

    gabbagabbahey

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    Homework Helper
    Gold Member

    Assuming that you are trying to find [tex]\frac{dy}{dx}[/tex] (you didn't actually tell us what you are trying to calculate!), then it is wrong....However, I can't tell you what you did wrong since you haven't shown me what you did to get your answer....if you do that, I'll be able to help you :wink:
     
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