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Homework Help: Solve for a, b and c

  1. Jul 6, 2014 #1
    1. The problem statement, all variables and given/known data


    2. Relevant equations

    3. The attempt at a solution

    What do I do from here?

    Attached Files:

  2. jcsd
  3. Jul 6, 2014 #2


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    think there is a typo in the question. Where it says "f(x) = 0", x should be a number, the same as in f(4) = 0 and f(-2) = -6.

    You did the right thing setting up two equations in a, b, and c. If the question was printed correctly you would be able to get three equations.

    If f(x) = 0 for every value of x, then a = b = c = 0, but that doesn't make any sense when the question says f(-2) = -6.
  4. Jul 6, 2014 #3

    Ray Vickson

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    I suspect it means that ##f(x_0) = 0## for some specified value of ##x_0## with ##x_0 \neq -2,4##. Then you would, indeed, have three (linear) equations in the three unknowns a,b,c, and you ought to be able to write the solution.

    I never read photo attachments of handwritten work, so I will not comment on your efforts. (PF standards actually say you should type out stuff except for unusual circumstances, such as including diagrams from books or whatever.)
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