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Math Help - remainder

  1. #1
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    remainder

    hi, the question i've got is,

    find the remainder when the polynomial P(x) is divided by the linear expression f(x):

    P(x) = x^3 + 2
    f(x) = x + 1

    i came up with remainder 2 but the book says its 1. can someone explain this to me?

    thankyou
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  2. #2
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    Quote Originally Posted by mark View Post
    find the remainder when the polynomial P(x) is divided by the linear expression f(x):
    P(x) = x^3 + 2
    f(x) = x + 1
    i came up with 2 but the book says its 1. can someone explain this to me?
    By the remainder theorem it is just P(-1).
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  3. #3
    MHF Contributor
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    Talking

    Quote Originally Posted by mark View Post
    i came up with remainder 2 but the book says its 1. can someone explain this to me?
    Until we can see what you've done, I'm afraid there is no way to explain what error you might have made. Sorry!
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  4. #4
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    ah, i've actually realised its got to be 1, i wasn't using the proper steps when figuring it out. sorry about that people.
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