Posts Tagged ‘Mathematical proof’

No, this is not a commercial of any kind (trying to convince you that if you buy 1 you will get 2)! This is just a mathematical proof that 2=1. I remember that my math teacher in high school first showed me this. I was quite impressed! A few days ago I randomly encountered the proof and recalled it. Here it is: X = Y X*X = Y*X ; Multiply by X X*X-Y*Y = Y*X-Y*Y ; Subtract Y*Y from both sides (X-Y)*(X+Y) = Y*(X-Y) ; Some standard conversions X+Y = Y ; Cancel out (X-Y) 2*X = X ; Use that X = Y 2 = 1 ; Divide both sides by X Are you convinced now? ;-)