Which of the following statements is a valid polynomial identity?

Statement 1: x3 + 64 = (x + 4)(x2 + 4x + 16)
Statement 2: x3 + 64 = (x − 4)(x2 + 4x + 16)

a
Only statement 1 is valid.

b
Only statement 2 is valid.

c
Statement 1 and statement 2 are valid.

d
Statement 1 and statement 2 are invalid.