The expression is .
The expression is not a polynomial.
The variable has an exponent which is not a whole number. So, it is not a polynomial.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7eefaa3ac7bd8e98eac7fcf0604ca063.png\")
.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7eefaa3ac7bd8e98eac7fcf0604ca063.png\")
is not a polynomial.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=71ebb8e1306429fdc294ba93e9a815aa.png\")
has an exponent which is not a whole number. So, it is not a polynomial.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")