All pastes #1373447 Raw Edit

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public text v1 · immutable
#1373447 ·published 2009-03-26 22:52 UTC
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let a = b.
a^2 = ab
a^2 - b^2 = ab - b^2
(a+b)(a-b) = b(a-b)
a+b = b
2b = b
2 = 1