Question

I think its A but I want to double check

Answer 1

(3x + 8y) • (3x - 8y)

Explanation:

Answer 2

It's not a. If I expanded "a" I would get = (9x - 64y)(9x - 64y) hence the square root. If I did FOIL I would not get the correct answer. "A" is essentially "b" written differently.