The expression is .
(Apply pythagorean identity: ) \ \
(Subtract: ) \ \
The simplified expression value is .
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=dd8b12ef25e0cfd8893d232fc73a42b2.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=be81b50451e04ced4ce2c4bcf27dfa97.png\")
(Apply pythagorean identity: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=360060019d7329bc476ebd4389e7844d.png\")
) \ \
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ccb8ce7f0e4f679bd81823b98e72d7df.png\")
(Subtract: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=aac59d0f4260e2235b7f1eeb5f17e6b6.png\")
) \ \
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9025a54fdbc7611e1faba38b5223b0a0.png\")
.