The expression is not a polynomial.
The variable has an exponent which is not a whole number. So, it is not a polynomial.
The solution is B.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e0dea0a78fd1dd96008aa22db9138c0a.png\")
is not a polynomial.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9e1869afc441696f7b85e1023258bfdc.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\")