Find the mistake :)

[Chickenrunnn]

Hey there !

Here is a (very) easy enigma Find out the problem xD

We firstly fix :
X=1 and by definition, X = X (Don't tell me you don't understand ._.)
<=> X² = X² (square)
<=> X² - X² = X² - X² (subtract X²)
<=> X(X - X) = (X + X)(X - X) (Factorize, Note that a²-a²=a(a-a), and that a²-b²=(a+b)(a-b))
<=> X = X + X (Simplify)
<=> X = 2 X (addition)
<=> 1 = 2 (because X = 1)

1=2 ?? OMGG .____.

If you can't find the reason why it is buggy, click on the spoiler

 

The problem comes from those 2 lines :
<=> X(X - X) = (X + X)(X - X) (Factorize)
<=> X = X + X (Simplify)

Indeed, you simplify dividing by (X-X), which is equal to zero, which is IMPOSSIBLE

Hehe
Hope you liked x)

Cya people