The factors of x2+4y2+4y-4xy-2x-8 are
We have ,
= 
= 
Let a = ( x-2y) , then the expression becomes ,
= 
= 
= a(a-4) + 2( a -4)
=
Put a = ( x -2y)
= 
Thus the factors of 
3
The factors of x2+4y2+4y-4xy-2x-8 are
We have ,
=
=
Let a = ( x-2y) , then the expression becomes ,
=
=
= a(a-4) + 2( a -4)
=
Put a = ( x -2y)
=
Thus the factors of