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C2 maths help

  1. Apr 8, 2009 #1
    1. The problem statement, all variables and given/known data
    Given that (x-1) and (x+1) are factors of px^3 + qx^2 - 3x - 7 find the value of of p and q.



    2. Relevant equations
    Not sure but I think ou have to solve as simultaneous equations.


    3. The attempt at a solution
    I am completely lost and have no idea where to start.

    Any help would be greatly appreciated. :smile:
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Apr 8, 2009 #2

    dx

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    Gold Member

    Hint: If (x+1) and (x-1) are factors of f(x), then f(-1) = 0 and f(1) = 0.
     
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