I found this in some other website, its basically the manipulation of a formula to finally give 1=0!. Here it is:
Let x = 1
Then, x^2=x
x^2-1 = x-1
Dividing both sides by (x-1), we get <--- here you divide by zero which isn't allowed
x+1 = 1
x+1-1 = 0, so
Since x=1,
1=0