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

is it s^4?

Answer 2

s^4-16?

Answer 3

thiink about the problem this way

(s^2)^2 - (4)^2

now you have the difference of 2 squares..

Answer 4

\[(s ^{2}-4)(s ^{2}+4)\]

Answer 5

thats the start...

after that you will have pair of brackets containing the difference of 2 squares... so factor that as well

Answer 6

option d correct only simplify \[a ^{2}-b ^{2}=(a+b)(a-b) also using i ^{2}=-1\]

Answer 7

then we get (s-2i)(s+2i)(s-2)(s+2)