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Math Help - More rational expressions File attached

  1. #1
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    More rational expressions File attached

    More rational expressions. I am trying to understand this but...

    Find the LCD for the given and convert each into an equivalent rational expression with teh LCD as the denominator.

    4 , 5x
    ---- --------
    x-y 2y-2x

    I factored what could be to get

    4 , 5x
    ---- --------
    x-y 2(y-x)

    now I think the LCD is 2(y-x)


    The next problem is

    3 2b -5
    ---------- , --------- , -----------
    4b^2 - 9 2b + 3 2b^2-3b

    I factored what I could (I think)

    3 2b -5
    ---------- , --------- , -----------
    4b^2 - 9 2b + 3 b(2b-3)


    Thanks again for your help!!
    Last edited by Chester; August 6th 2006 at 07:49 AM.
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  2. #2
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    Quote Originally Posted by Chester
    More rational expressions. I am trying to understand this but...

    Find the LCD for the given and convert each into an equivalent rational expression with teh LCD as the denominator.

    4 , 5x
    ---- --------
    x-y 2y-2x

    I factored what could be to get

    4 , 5x
    ---- --------
    x-y 2(y-x)

    now I think the LCD is 2(y-x)
    Good.


    The next problem is

    3 2b -5
    ---------- , --------- , -----------
    4b^2 - 9 2b + 3 2b^2-3b

    I factored what I could (I think)

    3 2b -5
    ---------- , --------- , -----------
    4b^2 - 9 2b + 3 b(2b-3)
    You can do more.

    \frac{3}{(2b+3)(2b-3)},\frac{2b}{2b+3}, \frac{-5}{b(2b-3)}
    Therefore the LCD is,
    b(2b+3)(2b-3)

    Also, place your questions into,
    "Pre-Algebra and Algebra" section.
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  3. #3
    Junior Member
    Joined
    Jul 2006
    Posts
    25

    Thanks

    Will do. Thanks!!
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