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Help with a derivative

  1. Apr 13, 2012 #1
    1. The problem statement, all variables and given/known data

    derivative of: (14x^2)/sqrt(1-x)

    2. Relevant equations



    3. The attempt at a solution

    I am at this point at finding the derivative:

    (28x(sqrt(1-x))+((7x^2)/sqrt(1-x))/(1-x)

    I am confused about the next step because don't know how it's derived from the previous attempt:

    Final solution: (28x-21x^2)/(1-x)^3/2

    How is this derived?
     
  2. jcsd
  3. Apr 13, 2012 #2
    for your equation above it should be 28x/sqrt(1-x) + 7x^2/(1-x)^3/2 then go from there..
     
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