Use an area model to factor each of the following expressions.

1. $x y - 6 x - 18 + 3 y$ 

   Hint (a):

   $3y$	$-18$
   $xy$	$-6x$

   More Help (a):

   Look for common factors in each row and column.

2. $2 x y - 3 y + 2 x - 3$ 

   Hint (b):

   See the hints in part (a).

   Answer (b):

   $(2x−3)(y+1)$

3. $12 y + 14 x - 8 x y - 21$ 

   Hint (c):

   See the hints in part (a).

4. How did you determine where to place the terms in your area models?

   Hint (d):

   There needs to be a common factor in each row and column.