\
The expression is
The sum is unchanged no matter how one groups the numbers.
This illustrates the Zero product property of multiplication:
Question illustrates Zero product property of multiplication.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=06796deb9db23900e7def8c11ea08cba.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=896237b5b69baae9ad1dd39dc157a2b3.png\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")