Answer:
V=8xxxyyy=8x³y³
Explanation:
In the question, V=lwh, the value for l is given to us as 2xy. Because it is a cube, all of the length of the edges are the same, so l=w=h, which means w=2xy and h=2xy.
Plug in w=2xy h=2xy l=2xy into the equation V=lwh.
V=2xy·2xy·2xy
V=(2·2·2)(x·x·x)(y·y·y)
V=8xxxyyy=8x³y³