Jackson wants to make an open-top box by cutting out corners of a square piece of cardboard and folding up the sides. The cardboard is a 12 inch by 12 inch square. The volume V(x) in cubic inches of the open-top box is a function of the side length x in inches of the square cutouts. Write an expression for V(x).

a) x(12−2x)(12−2x)
b) x(12)(12)−2x
c) x(10−2x)(10−2x)
d) x(8.5−2x)(11−2x)