\
The expression is
.
\
R
ationalize the numerator.
\
\
\
Cancel common terms.
\
\
\
\
.
\
\
.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f74f965d8f6e34b0be0289a2cb4c122b.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ceb091b0c956c1398bbac14328f9ecc5.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=229893d5d95b3ed5eb63136943ccab0a.png\")
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![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=dc6c81aae592210b34d0e2aa25d1fabe.png\")
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![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=63076aa7c8326878b43bf0b640b11384.png\")
.![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=433f18bdb02517259338330b5ea9a6cd.png\")
.