Please help me ASAP I’m really confused

The volume of a cube-shaped shipping container is 13,824 cubic inches. find the edge length of the shipping container.

If 2(a^2+b^2)=(a+b)^2 then, > a+b=0, > ab=0, > a=b, > 2a=b

Aweekly newspaper charges $72 for each inch in length and one column width. what is the cost of an ad that runs 2 column inches long and 2 columns wide? its not 288