Question

What is the factored form of the expression?

s^4 – 16

A. (s - 2)^2(s + 2)^2

B. (s - 2)(s + 2)

C. (s - i)(s + i)(s - 2)(s + 2)

D. (s - 2i)(s + 2i)(s - 2)(s + 2)

Answer 1

It's D. Just use FOIL to check