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superchunk said:
Proof that 2 = 1

Let a and b be equal non-zero quantities

a = b

Multiply through by a

a^2 = ab

Subtract b^2

a^2 - b^2 = ab - b^2

Factor both sides

(a - b)(a + b) = b(a - b)

Divide out (a - b)

a + b = b

Observing that a = b

b + b = b

Combine like terms on the left

2b = b

Divide by the non-zero b

2 = 1

Q.E.D.

edited: someone got it

 



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