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Math Help - Hard factoring problem

  1. #1
    Aug 2011

    Question Hard factoring problem

    Hi. I had this practice problem for learning factoring:


    I eventually gave up, but the answer was:


    I'm wondering if anyone understands what steps were taken. (Which unfortunately were not described on the answer page.) I tried distributing, grouping, and factoring formulas, but the closest I got (if you want to call it progress) was:


    Anyway, I'm about at the point now where I can hardly see the numbers clearly...
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  2. #2
    Member anonimnystefy's Avatar
    Jul 2011

    Re: Hard factoring problem

    hi infraRed

    you can write that like this:

    try to factor this expression with difference of the squares method.
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