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Math Help - Performing Operations?

  1. #1
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    Performing Operations?

    Something so different from what I taught. I have no idea how to solve this.

    24x^2z^2-2x^2z^2+x^2+z^2

    (x+y+xy)-(3x+4x^2)

    NOTE: the exponents behind the z's are suppose to be -2.
    Last edited by deekay930; December 18th 2009 at 11:11 AM. Reason: the equation was wrong.
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  2. #2
    Senior Member Dinkydoe's Avatar
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    Solve what actually?

    I see no equation or a problem. Only two strings of variables I suppose?
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  3. #3
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    Quote Originally Posted by Dinkydoe View Post
    Solve what actually?

    I see no equation or a problem. Only two strings of variables I suppose?
    It says to perform each of the operation and put the answers in descending order with regard to the x variable.
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  4. #4
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    Quote Originally Posted by deekay930 View Post
    Something so different from what I taught. I have no idea how to solve this.

    24x^2z^{-2}-2x^2z^{-2}+x^2+z^{-2}
    Did you notice that the x and z dependence of the first two terms are exactly the same? Combine them. If you were told "put the answers in descending order with regard to the x variable", since all three terms have x^2, they can be in any order

    (x+y+xy)-(3x+4x^2)
    x- 3x= -2x.

    NOTE: the exponents behind the z's are suppose to be -2.
    So use "z^{-2}".
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