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#2 Re: Help Me ! » 1+1=1 » 2009-01-16 00:06:13

x = y
x^2 = xy
x^2 - y^2 = xy - y^2  ----------  here 0 = 0
(x + y)(x - y) = y(x - y)  --------  divide by 0 is undetermined down
x + y = y
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