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Math Help - Sign Chart

  1. #1
    Junior Member
    Joined
    Jan 2009
    Posts
    54

    Post Sign Chart

    I am having problem explaining the following using sign charts any help would be appreciated

    Thanks - S
    Attached Thumbnails Attached Thumbnails Sign Chart-untitled.jpg  
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  2. #2
    MHF Contributor
    Joined
    Nov 2008
    From
    France
    Posts
    1,458
    Hi

    Sign charts are not very useful here since

    \frac{x^2+10x+25}{x+1} = \frac{(x+5)^2}{x+1}

    and (x+5) is obviously always positive
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