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Math Help - Cancelling down

  1. #1
    Member GAdams's Avatar
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    Cancelling down

    I have

    ( 6n - 3n^3 ) / ( 2n^3 + 4n^2 )

    Can someone show me how to cancel this down?

    I got 6-3n^2 / 2n^2+4n

    But I think it might be wrong
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  2. #2
    Bar0n janvdl's Avatar
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    Quote Originally Posted by GAdams View Post
    I have

    ( 6n - 3n^3 ) / ( 2n^3 + 4n^2 )

    Can someone show me how to cancel this down?

    I got 6-3n^2 / 2n^2+4n

    But I think it might be wrong
    Well i think you're right. I might be missing something, but i cant see a way how it can be cancelled down any further.
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  3. #3
    Flow Master
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    Quote Originally Posted by janvdl View Post
    Well i think you're right. I might be missing something, but i cant see a way how it can be cancelled down any further.
    Agreed.

    Unless the final answer requires the numerator and denominator to be factorised.

    And there's always the chance of a typo in the question ...... ( 12n - 3n^3 ) / ( 2n^3 + 4n^2 ) cancels down in perhaps a more 'expected' way .....
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  4. #4
    Bar0n janvdl's Avatar
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    Quote Originally Posted by mr fantastic View Post
    Agreed.

    Unless the final answer requires the numerator and denominator to be factorised.

    And there's always the chance of a typo in the question ...... ( 12n - 3n^3 ) / ( 2n^3 + 4n^2 ) cancels down in perhaps a more 'expected' way .....
    But that's rather a big typo to make. Think about it. Pressing 6 instead of 12... Also he got the same answer as one would expect for the problem given. So i doubt that there's a typo.
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  5. #5
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    Quote Originally Posted by janvdl View Post
    But that's rather a big typo to make. Think about it. Pressing 6 instead of 12... Also he got the same answer as one would expect for the problem given. So i doubt that there's a typo.
    I was thinking more along the lines of a typo where the question was sourced.

    But you're right - it's a long shot.

    Probable moral of the story: A correct answer sometimes doesn't seem correct.
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