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

    Dec 21, 2006, 03:53 PM
    Math Problem
    I am having a problem with one equation that is ab-cd=0. I am supposed to solve for c and have been stuck on it. Can anyone help me?
    CaptainForest's Avatar
    CaptainForest Posts: 3,645, Reputation: 393
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    #2

    Dec 21, 2006, 04:49 PM
    ab - cd = 0
    cd = ab
    c = ab / d
    dittttka's Avatar
    dittttka Posts: 9, Reputation: 1
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    #3

    Dec 23, 2006, 12:51 AM
    Are you sure that you are supposed to solve it? That's an expression associated with matrix algebra called the discriminet... and if ab - cd = 0, in the matrix (a b)
    (c d)
    Then the matrix is invertable
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #4

    Dec 23, 2006, 01:02 AM
    Determinant, not "discriminet" :p
    dittttka's Avatar
    dittttka Posts: 9, Reputation: 1
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    #5

    Dec 24, 2006, 12:59 AM
    Yeah sorry... was doing that lesson when I responded... but that aside did that help or were you supposed to solve it?
    Capuchin's Avatar
    Capuchin Posts: 5,255, Reputation: 656
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    #6

    Dec 24, 2006, 03:43 AM
    I think they were just looking for algebra, not matrices :)
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