I'm not sure how Δx works when it's being multiplied. Can anyone explain?

Ex. (x+Δx) (x+Δx)= ???

What does x(Δx)=?
Would it be Δx^2
But then.. what does Δx(Δx)=?

Question

I'm not sure how Δx works when it's being multiplied.  Can anyone explain?

Ex. (x+Δx)  (x+Δx)= ???

What does    x(Δx)=? 
Would it be Δx^2
But then.. what  does Δx(Δx)=?

anonymous · Answer

it's just about notation......that's all...
think of $\large \Delta x $=h so all you have is (x+h)(x+h).  you can do foil on that...
but as far as notation,  $\large x(\Delta x) \ne  \Delta x^2  $ 
but rather this is the case: $\large \Delta x^2 =\Delta x \cdot \Delta x  $
so, $\large x(\Delta x) $ is just $\large x(\Delta x) $ or simply $\large x \Delta x $