a box without a top is made from a rectangular piece of cardboard, with dimensions 4 m by 2 m, by cutting out square corners with side length x.

which equation can be used to determine the greatest possible volume of the cardboard box?

a. (4−x)(2−x)x=0

b. (4−2x)(2−2x)x=0

c. (x−4)(x−2)x=0

d. (4x−2)(2x−4)=0