Thread: find the trick.

x^2-x^2=x^2-x^2

_factorize : (x+x)(x-x)=x(x-x)
_samplify by (x-x): (x+x)=x
_then : 2x=x
_so 2=1
how does it come that?????

Originally Posted by lebanon

x^2-x^2=x^2-x^2

_factorize : (x+x)(x-x)=x(x-x)
_samplify by (x-x): (x+x)=x_then : 2x=x
_so 2=1
how does it come that?????

Title should be renamed to "find the mistake."

Here it is:

divide by (x-x): (x+x)=x

Division by zero is undefined.