WTF?

[img]http://us.st11.yimg.com/us.st.yimg.com/I/computergear_1918_3785228[/img]

I saw this and its driving me crazy if you do the math it does come out to 1+1=1 Can someone please explain to me any way it could not be true it is in proof form and follows all algebraic rules

Well, (x+y)(x-y)/(x-y) is equal to 0/0 which is undefined, and so is y(x-y)/(x-y) so I don't know if that has anything to do with this.

And also, what is the :. symbol?

thats so weird. but it does make sense because the math is correct. ill copy it down and ask my teacher about it tommorow.

it's easy. after factorising you divide by (x-y) if x=y then you divide by zero. BAM. instant error. and the :. means therefore

ooooo gotcha yea i was thinkin it had to be something with an undifined number

lol im just using this thread to look at my new sig

Just a point but there are loads of proofs like that, they all prove that

a!=b x!=y etc

Where did you find that question? it is not possible at all.

if x = y when it says (x+y)(x-y) ((x-y) that would be 0/0 which was stated before, and 0 cannot be a denominator. if x = y how can (x + y) = y? I don't think this equation works, but I'll ask my teacher in a little bit.

it was on one of those crazy shirt websites I think it was meant to confuse people because it looks like its a legit proof