\
The expression is .
(Substitute a = 13.5)
= 13.5 (Product of two same signs is positive)
The value of expression is 13.5.
![\"\"](\"http://c4anything.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a67a0d22aeb2ffc9d593c6de0626ad8c.png\")
. ![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c929886fc96d4e5aaa1487fb3a9dff7b.png\")
(Substitute a = ![\"\"](\"/MathKey/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=90a2dffa4cf28836c23bfcd658a94d29.png\")
13.5)![\"\"](\"http://c4anything.com/userfiles/image/steps_images/solution.JPG\")