Math
posted by Jacinta on .
Suppose you take a piece of cardboard measuring 7 inches by 7 inches, cut out square corners with sides x inches long, and then fold up the cardboard to make an open box. Express the volume V of the box as a function of x.

I knew this question sounded familiar.
I answered it two days ago.
http://www.jiskha.com/display.cgi?id=1245803469 
The link shows something like the box described in the question. Disregard the cover.
(Broken Link Removed)
Width of the box = 7xx = 72x
Length of the box = 7xx = 72x
Height of the box = x
Can you calculate the volume? 
PLEASE ANSWER