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    cookie007's Avatar
    cookie007 Posts: 1, Reputation: 1
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    #1

    Mar 1, 2010, 11:08 PM
    how to find focus of equation
    what is the focus of
    4x^2-25y^2=100
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #2

    Mar 2, 2010, 09:15 AM

    First - do you recognize that this is te hequatio of a hyperbola?You need to put the equation into the standard form for a hyperbola:



    The focus can then be found from:
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