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

    Aug 16, 2009, 08:34 AM
    I am trying to rearrange the formula to make y the subject
    s=r-square root (r squared - y squared)

    Regards

    Peter
    galactus's Avatar
    galactus Posts: 2,271, Reputation: 282
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    #2

    Aug 16, 2009, 08:53 AM


    Subtract r from both sides:



    Now, square both sides, subtract r^2 from both sides, then multiply by -1 to make positive, take square root of both sides.
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