An open box is to be made from a rectangular piece of tin 12 inches long and 10 inches wide by cutting pieces of x-inch square from each corner and bonding up the sides. find the formula that expresses the volume of the box as a function of x.

Answer 1

volume = x(12-2x)(10-2x)

expand if needed.

Answer 2

V=120x-44x2+4x3