![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
The expression is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=559231d11119207129aadbbcd544a1ef.png\")
.
Simplify the expression.
\![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=6edc3083bd300f7e3138258f4dd180d0.png\")
(Take out common terms)
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=53adc98ee26c46267eacd8034a93e48f.png\")
(Cancel common terms)
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b9fd7370122ca7dd99232a937d068d7a.png\")
.
Therefore, the simplified expression is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5be1bc7990cd2086d1567ac6d2d66542.png\")
.
Option C is right choice.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
Option C is right choice.