The expression is .
(Commutative property of addition: a + b = b + a)
(Distributive property: ab + ac = a(b + c))
(Add: )
The simplified expression is .
![\"\"](\"http://www.mathskey.com/userfiles/image/Library/Commutative_Property_of_addition.gif\")
![\"\"](\"http://www.mathskey.com/userfiles/image/Library/Distributive_Property1.gif\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=1fe23b312f68ad26c4446348ab2e8b72.png\")
. ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cdb64dcc6cd78678af630c5b873996ba.png\")
(Commutative property of addition: a + b = b + a)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f89501b63fc8fa16c9fbef2ff455b362.png\")
(Distributive property: ab + ac = a(b + c))![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=78ebdacc4b31e6a06046d115d2eb5424.png\")
(Add: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0a09be588f7272d45d6f40905c6b3a22.png\")
)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0e9c6a636cc7097192cbec6dc6be34ba.png\")
.