Solution:
Concept- In order to answer this question, we must know the value of x. To do this, we must take 2 to the left of x and a cube on both sides. To arrive at the solution, use the algebraic identity of
and other identities
Therefore, we must determine the value of 
Now, in the preceding equation, add 2 to the LHS and take cube from both sides to get,
Now, since we know 
Applying this condition to the equation we have above
Simplify the equation we have above by:
From equation 
we get,
Now, simplifying the equation, we get
Hence, the necessary value of 
Therefore, option 2 is correct.
