If a/b=c/d the proof that ac+bd/ac-bd=a2+b2/a2-b2(Square)
Question asked by: Aamir9
Asked on: 07 Mar 2010
Because if a/b = c/d then you can substitute like with like from one equation to the other and that equality will be preserved.
By: artiste
Replied at: 07 Mar 2010
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acbdacbda2b2a2b2square proof abcd
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