\
The expression
is
.
\
Apply distributive property:
.
\
\
\
\
The value of
.
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.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=fa0629d20f738f4aa6a271954564bcc5.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=54697f0d053f9d014ea7d494f7f199f1.png\")
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![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ad1f55b256c4c3989a01d93bb061055f.png\")
.