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Polynomial Functions help

  1. Sep 6, 2006 #1
    Today was the second day of school, and my calc teacher gave some review homework. We did problems similar to the ones last year, but I don't remember how to do them. I'm sure it's pretty simple, but I need help anyways :uhh:

    It says:

    Expand and simplify. Express each equation in standard form:

    f(x)= (x-1) (x+3) (x-5)

    That's only one of them... I think I'll be able to handle the rest of them if someone can tell me how to do this one. Thanks.
  2. jcsd
  3. Sep 6, 2006 #2


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    The rules of this forum state that you must show some effort before we can help. Do you have any thoughts on what to do?
  4. Sep 6, 2006 #3


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    Do you know how to FOIL?

    Or, more generally, note that when you have some multiplication like (a + b)(c + d), every term in the first factor {a, b} gets multiplied by every term in the second factor {c, d}:

    ab +
    ac +
    bc +

    In an even more general case, if you had an expression like (a + b + c + d)(e + f), you'd again multiply every term in the first factor by every term in the second factor:

    ae +
    af +
    be +
    bf +
    ce +
    cf +
    de +

    - Warren
  5. Sep 6, 2006 #4


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    You might want to start by stating exactly what "standard form" is.
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