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Math Help - Factoring

  1. #1
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    Factoring

    I kinda need help with this.

    x^2 + 3x+ 2

    ax^2 - 9ax + 18a
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  2. #2
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    Quote Originally Posted by lovestarwarz View Post
    I kinda need help with this.

    x^2 + 3x+ 2

    ax^2 - 9ax + 18a
    (x\pm\alpha)(x\pm\beta)

    \alpha\cdot\beta=2

    \alpha +\beta=3
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  3. #3
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    For the second, take out a common factor of \displaystyle a first, then use the method dwsmith suggested.
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  4. #4
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    Quote Originally Posted by lovestarwarz View Post
    x^2 + 3x+ 2
    is (x+a)(x+b) where a+b=3 and ab=2


    Quote Originally Posted by lovestarwarz View Post
    ax^2 - 9ax + 18a
    Same goes here, just factor out 'a' first.
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  5. #5
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    thanks

    Mmk (:
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