What is wrong with the following calculations that seem to prove that 2 equals 1?
a = b let a = b aa = ab multiply by a aa - bb = ab - bb subtract bb (a + b)(a - b) = b(a - b) factor out a + b = b divide by (a - b) 2a = a substitute a for b 2 = 1 divide by a
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Last updated October 10th, 2003