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Post your current Ctrl+V (v2)

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Consider two non-zero numbers x and y such that

x = y.
Then x2 = xy.
Subtract the same thing from both sides:
x2 - y2 = xy - y2.
Dividing by (x-y), obtain
x + y = y.
Since x = y, we see that
2 y = y.
Thus 2 = 1, since we started with y nonzero.
Subtracting 1 from both sides,
1 = 0.

I was trying to fool my friend into proving that 1 does equal 0, although he was shook for a while because he didn't see the fallacy. Can you? :p
 
Consider two non-zero numbers x and y such that

x = y.
Then x2 = xy.
Subtract the same thing from both sides:
x2 - y2 = xy - y2.
Dividing by (x-y), obtain
x + y = y.
Since x = y, we see that
2 y = y.
Thus 2 = 1, since we started with y nonzero.
Subtracting 1 from both sides,
1 = 0.

I was trying to fool my friend into proving that 1 does equal 0, although he was shook for a while because he didn't see the fallacy. Can you? :p
Right there in the first step, multiplying by two =/= squaring :v
 
axew's ears are like butterfly wings, when he wakes up they gotta dry and unfold

(uhhh this is about my friend's dog axel, whose nickname is axew, not the pokemon lol)
 
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