Math Please Help
posted by Barb .
A pizza box top with a square base is to be made from a rectangular sheet of cardboard by cutting six 1inch squares from the corners and the middle sections and folding up the sides. If the area of the base is to 144 in^2, what piece of cardboard should be used.
Please explain the process, thanks in advance.

the base must be x2 by x2
(x2)^2 = 144
x2 = ±√144 = ±12 , but obviously x must be positive
x2=12
so the base should be 14 by 14
make a sketch to verify.