Question

What is the factored form of the expression?
s4 – 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 should be (s-2)(s+2)(s^2+4)

Answer 2

See why I am confused?

Answer 3

Well you can factor s^2+4 to get (s+2i)(s-2i)

Answer 4

Usually books won't go this far, but apparently this one does.

Answer 5

Ugh I really hate math sometimes