\
The expression is
.
\
(Substitute
y
= 0.8)
\
(Subtract:
)
\
The value of expression is 0.9
.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9845d0e0395aefb8242f63956f979f42.png\")
. ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=bb442b79f5064b35b33dcd4ac5c61cf2.png\")
(Substitute y = 0.8)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=db7951456c23ab1821f67a0c8fd4d374.png\")
(Subtract: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d9051af9883373913a45f3965a380834.png\")
)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")