The diagram shows a thin square sheet of metal measuring 24 cm by 24 cm. A square of side x cm is cut off from each corner. The remainder is then folded to form an open box, x cm deep, whose square base is shown shaded in the diagram. (1) x cm 24 cm x cm Write the volume, V cm³, of the box as V = 4x³ - 96x² +576x. 24 cm