Answer:
Explanation:
We are given the following in the question:
A square is 3 inches on each side. A small square, x inches on each side, is cut out from each corner of the original square.
The attached image shows the obtained square.
Area of square =

where s is the side of the square.
Area of bigger square =

Area of smaller square =

Area of remaining portion =
Area of bigger square - 4(Area of smaller square)

is the required polynomial function that gives remaining portion of the square.