What is the different between Expand and Simplify ?
Crudely speaking, they are opposites:
In[1]:= Expand[(x + y)^2] Out[1]= x^2 + 2 x y + y^2 In[2]:= Simplify[%] Out[2]= (x + y)^2
Ooh sorry I want the different between Simplify and Factor not simplify and expand ,Because I get the same result
