Reply to Justin

Dear Justin,

Welcome : P

In your earlier post :

a(x+y)is expanded to ax+ay or ax+ay is the expanded form of a(x+y).I tot the ans should be still this:a(x+y)?

Expansion here refers to the opposite of factorisation. We can see that the factor a is taken out. Therefore it is a(x+y).

Using law of distribution to do expansion we will have the following,