Classical Mathematical Fallacies #2

This is a classical mathematical fallacies. At hindsight, everything looks perfectly fine.

"π=3" Mathematical fallacy

“π=3” Mathematical fallacy

This is a rather difficult one as the error is actually hidden in the second last line! The mistake here is that we conveniently removed the power, but overlooked that there will be a \pm{ }. If we do account for it, we will have the original result.

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