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Math Help - Simplifying this expression

  1. #1
    Member princess_anna57's Avatar
    Joined
    Jul 2007
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    78

    Smile Simplifying this expression

    (5x - y)^2 - (x - 5y)^2 / -4x - 4y

    Here's what I got so far:
    5x^2 - 2xy + y^2 - x^2 + 10xy + 5y^2 / -4x - 4y

    and then

    4x^2 + 8xy + 6y^2 / -4x - 4y

    What do I do now?
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  2. #2
    MHF Contributor
    Joined
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    Thanks
    2
    1) Add parentheses so it says what you mean.

    2 + 3 / 5 is NOT the same as (2+3)/5

    2) Factor, Factor, Factor

    4x^2 + 8xy + 6y^2 = 2(2x^2 + 4xy + 3y^2) -- For example
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