The polynomial x3 + 64 is an example of a a. sum of cubes b. difference of cubes c. difference of squares d. perfect-square trinomial

X^3 is a perfect cube
64 is a perfect cube (since 64 = 4^3)
When I say "perfect cube" I mean it can be written in the form A^3 where "A" is a placeholder for a number or variable expression (such as x)

Since we have two cubes and we're adding them, we have a sum of cubes

Choice A) sum of cubes

Letter c i’d say