Answer:
Addition of the two cubic numbers gives the required result.
Explanation:
We have given the equation which is:
64 + 27 =91
The numbers 64 and 27 on left hand side of equation are the cubes of 4 and 3 respectively.
We know that when these numbers are added gives us 91
Hence, in polynomial expression it is

Hence, addition of the two cubic numbers gives the required result.