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Thread: Sign Chart

  1. January 15th 2009, 06:06 AM #1
    AlgebraicallyChallenged
    AlgebraicallyChallenged is offline
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    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. January 15th 2009, 08:02 AM #2
    running-gag
    running-gag is offline
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    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)² is obviously always positive
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