Posted by: jhyap August 16, 2006
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Theorem 0/0 = 4
0/0 = (4-4)/(2-2) = ((2+2)(2-2))/(2-2)
since 4 = 2^2 and a^2-b^2 = (a+b)(a-b)
= (2+2) = 4
Proved :)