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    big k's Avatar
    big k Posts: 4, Reputation: 1
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    #1

    Jan 18, 2007, 11:51 AM
    math coursework
    the equation I'm given is x*x=x+x+x+x


    pleasehelp asap I just don't get how u get a soulution to it as there are no numbers to start with :confused:

    thanks to all that try and help :P
    Thegreywizard's Avatar
    Thegreywizard Posts: 16, Reputation: 0
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    #2

    Jan 18, 2007, 11:54 AM
    ancer is x*x=4x
    x*x/x=4x/x
    x= 4



    hope I'm right
    Tuscany's Avatar
    Tuscany Posts: 1,049, Reputation: 229
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    #3

    Jan 18, 2007, 11:57 AM
    The equation is asking this:

    What two numbers multiplied together = 4 numbers added together.

    Guess and Check is a good strategy for this.
    CaptainForest's Avatar
    CaptainForest Posts: 3,645, Reputation: 393
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    #4

    Jan 18, 2007, 07:16 PM
    x*x=x+x+x+x
    x^2 = 4x
    x^2 - 4x = 0
    (x+0) (x-4) = 0

    x + 0 = 0
    x = 0

    x – 4 = 0
    x = 4

    Therefore, x = 0 or 4
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