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    Jonnyd2's Avatar
    Jonnyd2 Posts: 1, Reputation: 1
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    #1

    May 12, 2009, 05:51 AM
    What is the soultion
    b^2+4b-21=0
    What is the soultion for b
    JoeCanada76's Avatar
    JoeCanada76 Posts: 6,669, Reputation: 1707
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    #2

    May 12, 2009, 06:02 AM

    Sorry can not do your homework for you.
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #3

    May 12, 2009, 06:38 AM

    Factorise it.

    Hint: -3+7=4; -3*7=-21
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