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Math Help - Reducing expressions

  1. #1
    Junior Member
    Joined
    Jul 2006
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    Reducing expressions

    Could someone please explain the best way to reduce these expressions?


    4x^2
    -----
    2x^9



    -2x-8
    -----
    x^2+2x-8

    And how to solve this

    x^2 = 14x


    Thanks
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  2. #2
    Eater of Worlds
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    Chaneysville, PA
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    Thanks
    1
    Could someone please explain the best way to reduce these expressions?


    4x^2
    -----
    2x^9

    When you divide powers you subtract the exponents. Of course, 4/2=2.

    2-9=-7. So you have:
    2x^{-7}\;\ or\;\ \frac{2}{x^{7}}



    -2x-8
    -----
    x^2+2x-8

    Always check to see if anything factors.

    \frac{-2(x+4)}{(x-2)(x+4)}

    Now, cancel what will cancel.

    And how to solve this

    x^2 = 14x

    There isn't much to this.

    Divide through by x:

    x=14 or 0.
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  3. #3
    Junior Member
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    Thumbs up Thanks

    Thank you very much for taking the time to explain.

    Chester
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