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What's 1+1
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Jul 19, 2025
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#11
Assign 1 and 1 variables x and y. x = y, so x^2 = xy, then x^2 - y^2 = xy - y^2. By difference of squares formula, (x+y)(x-y) = y(x-y). Take out x-y from both sides, then x+y = y and x = 0. Do the same for y, and therefore 1 + 1 = 0.
What's 1+1