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Math Help - Help!!!

  1. #1
    Newbie
    Joined
    Jul 2008
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    4

    Help!!!

    how would you solve X2- X - 6
    X2 - 4

    Please give me some examples if you can!!!

    P.S. the two is supposed to mean X squared
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  2. #2
    Senior Member nikhil's Avatar
    Joined
    Jun 2008
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    290

    Check your question

    You have only given an expression(not an equation).so can't be solved for x.
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  3. #3
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    Jul 2008
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    I meant x2-x-6 over x2-4
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  4. #4
    Senior Member nikhil's Avatar
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    Jun 2008
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    Its called simplify the expression

    Ok so you want to simplify this.
    A)x^2-x-6=(x+2)(x-3)
    recall that
    a^2-b^2=(a+b)(a-b)
    so(B) x^2-4=(x+2)(x-2)
    dividing A by B we get
    (x+2)(x-3)/(x+2)(x-2)
    =(x-3)/x-2
    hope this helps.you may ask any doubt
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  5. #5
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    Jul 2008
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    confused...

    how did you get (x+2)(x-3)/(x+2)(x-2)? i'm trying to study for a college placement test and i've never even learned math like this so walk me through it if you don't mind!
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  6. #6
    Super Member
    Joined
    Jun 2008
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    Please have a look at this link to learn more about factoring polynomials:
    College Algebra Tutorial on Factoring Polynomials
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