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Thread: rearrangement

  1. Aug 18th 2014, 05:21 AM #1
    cxz7410123
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    rearrangement

    Hi,
    Could you explain me this rearrangement?
    Thanks in advance

    rearrangement-untitled-1.jpg
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  2. Aug 18th 2014, 05:37 AM #2
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    Re: rearrangement

    It looks like they've started by expanding the square.
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  3. Aug 18th 2014, 05:48 AM #3
    HallsofIvy
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    Re: rearrangement

    That's pretty much it: (a- b)^2= a^2- 2ab+ b^2. Here a= T and b= \frac{H}{\nu_s}. Then, of course, multiply each term by \frac{g}{2}.
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