After factoring the expression is written as a what?

Factoring is written as the product of simpler expressions/factors.

Step-by-step explanation:

Factoring (called "Factorising" in the UK) is the process of finding the factors.

Factoring is the method of finding what to multiply together to get an expression.

It is like "splitting" an expression into a multiplication of simpler expressions.

Example: factor

Both and 6 have a common factor of 2:

 is 2 × y

6 is 2 × 3

So we can factor the whole expression into:

So  has been "factored into" 2 and y+3.