Answer:
The factors for the given polynomial is (x-y) and (a+1) 
Therefore 
 
 
Explanation:
Given polynomial expression is 
 
 
To simplify the given polynomial: 
 
 
 ( Rewritting the above polynomial)
 ( Rewritting the above polynomial) 
 (Taking the common terms )
 (Taking the common terms ) 
 (using commutative property )
(using commutative property ) 
 (taking common factor )
 (taking common factor ) 
Therefore 
 
 
Therefore the factors for the given polynomial is (x-y) and (a+1)