17. What are the possible expressions for the dimensions of a cuboid whose volume is given below?
Volume = 12ky 2 + 8ky – 20k

18. If x = 2y + 6 then find the value of x 3 – 8y 3 – 36xy – 216.

Kindly refer the similar link for your query.
18  https://www.meritnation.com/ask-answer/question/if-x-2y-6-then-find-the-value-of-x3-8y3-36xy-216/linear-equations-in-two-variables/2367
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