prove that 2 = 3 | Mathematics | Page 1

placid gate Mar 9, 2024, 9:30 PM

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wtf why, is this real

balmy swiftBOT Mar 9, 2024, 9:30 PM

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ocean wigeon Mar 9, 2024, 9:32 PM

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placid gate wtf why, is this real

(1)² = (-1)²
1 = -1

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do you think this sounds "real" to you

placid gate Mar 9, 2024, 9:33 PM

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…no?

ocean wigeon Mar 9, 2024, 9:33 PM

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why not

placid gate Mar 9, 2024, 9:34 PM

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Idk

ocean wigeon Mar 9, 2024, 9:34 PM

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if you know that two numbers a² = b²,

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a = b is not the only way to get them to equal

ocean wigeon Mar 9, 2024, 9:34 PM

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ocean wigeon (1)² = (-1)² 1 = -1

you can see up here that a = -b is also a way

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so a² = b² means a = b or a = -b

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does that make sense so far

placid gate Mar 9, 2024, 9:35 PM

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yes ty

ocean wigeon Mar 9, 2024, 9:35 PM

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the proper way to write this is to use a ±

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this stands for "plus or minus"

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so a² = b² square roots on both sides to be a = ±b

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a² = b²
√(a²) = ±√(b²)
a = ±b

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square rooting this way prevents you from running into this mistake accidentally

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youd get 2 - 5/2 = ±(3 - 5/2) instead

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or -0.5 = ±0.5
which resolves that you dont get 2 = 3

placid gate Mar 9, 2024, 9:38 PM

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oh ok thank you 🙏🏼

ocean wigeon Mar 9, 2024, 9:38 PM

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np

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.solved

balmy swiftBOT Mar 9, 2024, 9:38 PM

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Solved

Post marked as solved by @ocean wigeon.

Use .unsolved if this was a mistake.

#prove that 2 = 3