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Originally Posted by Greybone
a * a = 2 * a = 2a
thus
a * a = a * b (since a=b)
and
2a = ab
(as deenogger mentioned)
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Let a = anything that's not 2. For example, let a = 6.
a * a = 6 * 6 = 36.
2a = 2 * 6 = 12.
Unless I'm missing something very very obvious, that's still a glaring problem, and the fact that you divide by zero is pretty much irrelevant. (not saying there isn't a legitimate proof that could be made to say 2=1 because you divide by zero, just saying, this ain't it.)
[sorry for the random bump. it was bothering me.]