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Posted by on Friday, January 11, 2013 at 1:11am.

Show that (a^2+b^2)(c^2+d^2)=(ac+bd)^2 + (ad-bc)^2

  • Math - , Friday, January 11, 2013 at 8:03am

    Just expand each of the sides and they will be the same
    LS = ...
    RS = ....

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