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Math Help - Need Help With Algebra

  1. #1
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    Need Help With Algebra

    how do you factor polynomial? such as 3x2 + 2x -18x -12?
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  2. #2
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by E-mac View Post
    how do you factor polynomial? such as 3x2 + 2x -18x -12?
    we would factor by grouping.

    first, rewrite as 3x^2 - 18x + 2x - 12

    now factor the common terms out of the first two and second two

    3x(x - 6) + 2(x - 6)

    now factor out the common (x - 6)

    (x - 6)(3x + 2)

    viola!
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  3. #3
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    Quote Originally Posted by E-mac View Post
    how do you factor polynomial? such as 3x2 + 2x -18x -12?



    1. Rewrite and rearrange the question:

    Let y(x)= 3x^2 - 18x + 2x - 12

    y(x) = 3x^2 - 16x - 12

    2. Use Synthetic Division method;

    Let
    x at any value (try n error) until you manage to get y(x)= 0

    in that case, if x = 6;

    <br />
y(6) = 3(6)^2 - 16(6) -12

    y(6) = 0



    So
    (y-6) is one of the factor, and synthetic division method can start be applied

    did u know how to use that method?

    Last edited by noob; June 25th 2008 at 06:19 AM.
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  4. #4
    Moo
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    Quote Originally Posted by Jhevon View Post

    viola!

    viol means "rape"

    It's "voilą"


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  5. #5
    Super Member wingless's Avatar
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    "Viola" is a four-stringed violin-like instrument (in English), maybe he meant it
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  6. #6
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by Moo View Post

    viol means "rape"

    It's "voilą"




    Quote Originally Posted by wingless View Post
    "Viola" is a four-stringed violin-like instrument (in English), maybe he meant it
    i meant what Moo said haha

    my fingers slipped when i typed, ti happens
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  7. #7
    Grand Panjandrum
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    Quote Originally Posted by Jhevon View Post


    i meant what Moo said haha

    ti happens
    tea happens, generally at about 16:00

    RonL
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  8. #8
    Moo
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    ti happens... to be a good series of electronic device...
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  9. #9
    is up to his old tricks again! Jhevon's Avatar
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    i hope you guys know i did the "ti" on purpose...that's why it's italicized
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