Question 41398
The volume of a box is 2p^4  + 17p^3  + 21p^2. 
The height is p, 
width is p + 7. 
height*width =p(p+7) =(p^2+7p)
the length = volume/(height*width)
= 2p^4  + 17p^3  + 21p^2/(p^2+7p)
=2p^2+3p
okay!