\
The difference is \ \
(The product of two same signs is positive) \ \
(Simplify: )
The difference is -9.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c68770096c5f15ac3a45a49e91ed28fb.png\")
\ \
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ba0b889d21c910483f2351e66696d759.png\")
(The product of two same signs is positive) \ \
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6eccf6b78ca70d6937239da64f38c73c.png\")
(Simplify: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=acb88d9aa5eeb6322f78f6650e8da5ad.png\")
)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")