Want to help?

Discussion in 'General Off-Topic Chat' started by Golfman560, Aug 31, 2009.

  1. Golfman560
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    Golfman560 TheRapist.com

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    Okay so I've got a math problem. Pretty sure it has a typo but whatever, its due Wednesday and I'll probably email the teacher.

    Here's how it goes:

    If f(x)=3x^2 - 2x + 7 and a != (Does not equal) x, write [f(x) - f(a)]/(x - a) as a single polynomial in terms of a and x.

    At first I thought it was supposed to be [f(x-h) - f(x)]/h) But that would be a huge typo.

    Anyone want to help?
     
  2. Veho

    Veho The man who cried "Ni".

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    It equals 3x + 3a - 2


    [f(x) - f(a)] = 3x2 - 2x + 7 - 3a2 + 2a - 7

    = 3(x2 - a2) - 2(x - a)

    = 3(x + a)(x - a) - 2(x - a)

    Divide that by (x-a) and you get the above result.
     
  3. Golfman560
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    Golfman560 TheRapist.com

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    Thanks, but all I really needed was this. I went somewhat braindead last night and also forgot how to graph on my calculator.

    Well now to do it and check my answer with yours. Thanks Veho.
     
  4. ACK06

    ACK06 Member

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    Intro to Calc?
     
  5. Golfman560
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    Golfman560 TheRapist.com

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    Well its the summer homework so kinda, more like a refresher of the last few years. I'll be starting Calc Wednesday.