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Prime numbers and primality testing
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RE: [PrimeNumbers] question about a proof
So we can write: (a+b)/2)^2+((a-b)/2)^2 =a^2/4 + ab/2 + b^2/4 + a^2/4 - ab/2 + b^2/4 =a^2/2 + b^2/2 Jon Perry firstname.lastname@example.org
Message 1 of 4 ,
Jan 3, 2003
So we can write:
=a^2/4 + ab/2 + b^2/4 + a^2/4 - ab/2 + b^2/4
=a^2/2 + b^2/2
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