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Math Help - Simplifying another expression

  1. #1
    Junior Member
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    Question Simplifying another expression

    \frac{(-4)^2x^2(yz)^4}{-16xy^{-4}z}

    So:

    \frac{-16x^2y^4z^4}{-16xy{-4}z}


    Then:

    xy^8z^3


    However, I'm told the correct answer is -xy^8z^3

    Why -x instead of x ?
    Last edited by mt_lapin; March 16th 2008 at 03:05 PM.
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  2. #2
    Junior Member NAPA55's Avatar
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    Remember, when you square a negative number, the result is always positive. In your numerator, you have (-4). The answer to that is 16, not -16.

    I think you got it from here.
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  3. #3
    Junior Member
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    Oh. You are absolutely right! I completely forgot about that.
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