Question

Which polynomial represents a sum of cubes

x^3-64
8x^3 +125
16x^3+1
26x^3+4

Answer 1

B

Explanation:

A sum of cubes has the form

a³ + b³

8x³ = (2x)³ and 125 = 5³

Hence

8x³ + 125 = (2x)³ + 5³ ← a sum of cubes