Frequent Questions about our Solver

The problem

Click to see the original problem

How you get the (x-y) (x+y+1)

Answer provided by our tutors

(x-y) is the common factor [it can be expressed as "x-y" or "-y+x"].  Since x-y has been factored out, that leaves a "+1" in the parentheses since that identifies the factored out (-y+x). 

Clicking on a particular solution step allows you to quickly review the logic which was applied. 

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