The expression is .
(Distribute )
(Product of two different signs is negative)
(Product of two same signs is positive)
The simplified expression is .
![\"distributive](\"http://www.mathskey.com/userfiles/image/Library/Distributive_Property3.gif\")
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d3428c206f271cfb3e22c9232c1e2bc3.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d919f1c9c0e2d69cab1b14212541aa26.png\")
(Distribute ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ebd6ef47d69f34cd126a47abb23f1a31.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e6d78df0c733d96a28e4f158a14623f7.png\")
(Product of two different signs is negative)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=1029b1fc145c1a6f812e24e9646d6683.png\")
(Product of two same signs is positive)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ac8f27bdd4495a299179cea920daf5f4.png\")
.