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Ma8ee
on Dec 15, 2024
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A visual proof that a^2 – b^2 = (a + b)(a – b)
> Result is negative. If you swap the variables, you have to imagine the area is a negative area
And why is that a problem? Just reverse the equation before and after the proof.
kbutler
on Dec 16, 2024
[–]
It means it isn't a "proof", it's an illustration of a partial domain of the original equation.
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And why is that a problem? Just reverse the equation before and after the proof.