need help to identify what number system

teena

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Joined
Aug 28, 2007
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1
In what number system (ie: whole.etc) would the following be true:
(A+B)^2=A^2+B^2
 
Take your pick, as long as either A or B is zero (0).

How about a system of vectors such that all vectors in the system are perpendicular to all others?

It's an odd question. Can you provide the exact wording?
 
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