Factoring 4s^2-256?

Question

I got 4(s^2-64) are you supposed to further reduce that?

Answer 1

4s² - 256 = 4(s² - 64) = 4(s - 8)(s + 8)

Answer 2

a^2 - b^2 = (a+b)(a-b)

so your expression is (2s+16)(2s-16)