help with factor by grouping
It would help to have a specific problem to solve.
Since this is not my area of expertise, I searched Google under the key words "math factor by grouping " to get these possible sources:
http://www.wtamu.edu/academic/anns/mps/math/mathlab/int_algebra/int_alg_tut27_gcf.htm
(Broken Link Removed)
http://mathforum.org/library/drmath/view/53124.html
http://www.mathvids.com/lesson/mathhelp/17-factoring-by-grouping
http://www.yourteacher.com/collegeintermediatealgebra/factoringbygrouping.php
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
I hope this helps. Thanks for asking.