16.What are the possible expressions for the dimensions of the cuboids whose volumes are given below ?
i)Volume $$3x^2 - 12x$$
ii)Volume $$12ky^2 + 8ky - 20k$$
i)We have Volume of cuboid $$3x^2 - 12x = 3x(x - 4)$$
ii)We have Volume of cuboid $$12ky^2 + 8ky - 20k$$
$$= 12ky^2 + 20ky - 12ky - 20k$$
$$= 4ky(3y - 5) - 4k(3y - 5)$$
$$= (3y - 5)(4ky - 4k)$$
$$= (3y - 5)4k(y - 1)$$