Help polishing off a Classical E&M HW question

[Neumann12]

Homework Statement

This isn't the whole homework problem but I need to show that (p dot gradient operator)E is equal to Gradient operator(p Dot E)

Homework Equations

P= Dipole Moment
E= non constant electric field.

The Attempt at a Solution

Like I said this is the last part of the problem, I just can't make this jump.

 

[maser22]

Neumann12,

I know of two physicists who can properly explain your homework and help you understand it. One ("srastgoo") is a Ph.D. candidate in quantum physics with a specialization in black holes. The other ("jsharma") has a Master's in applied physics. For the sole purpose of helping you reach these persons, I am giving you a homework help link that will lead to both of them.

After clicking on the link, register on the site (it's free) and submit a Solution Request. The important part is to enter "srastgoo" in the Specialist's username field. You can also do the same for "jsharma" with a separate Solution Request.

Please post back to me here and let me know which one of them helped you and how well they explained your homework question.

 

[kloptok]

Have you tried expanding the (p dot gradient)E with some vector algebra rules? I'm not saying it will work, but it seems like the obvious way to start to me.