Math Fallacies

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Sascha8a
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Joined: 08 Oct 2015, 15:45
Location: Austria, Wiener Neustadt

Math Fallacies

Post by Sascha8a » 13 Oct 2015, 09:22

So today I've visited a old friends of mine in his school. His class just had math lessons and they had something very interesting written on their blackboard. They just started a new chapter and their math teacher showed them this Formula.

Discuss below. Did you find the mistake?

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Last edited by Sascha8a on 14 Oct 2015, 07:46, edited 1 time in total.
“The master has failed more times than the beginner has even tried” – Stephen McCranie
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bustered1
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Location: Southern USA, 'murica

Re: Math Fallacies

Post by bustered1 » 13 Oct 2015, 09:32

On number 5 you can't just divide (a-b) I believe it turns into a quadratic in 4 therefor you solve it as such.
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