Question

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

I think the answer is B

Answer 2

Again, no.
Do you recognize that this is a difference in squares?

Answer 3

no

Answer 4

Ok. Do you see how s^2 * s^2 = s^4? and that 4 * 4 = 16?

Answer 5

yes so that means the answer has to be A

Answer 6

Nope...
\[s^{4} - 16 = (s^{2} - 4)(s^{2} + 4)\]Now, do you realize that s^2 - 4 is also a difference in squares?

Answer 7

no

Answer 8

Alright. The form
\[a^{2} - b^{2} = (a + b)(a - b)\]Therefore, \[s^{2} - 4 = (s + 2)(s - 2)
The same for s^2 + 4. It turns imaginary. \[s^{2} + 4 = (s - 2i)(s + 2i)

Answer 9

so the answer is C

Answer 10

You've guessed every answer except the correct one...

Answer 11

ok thanks for the help I get it now.

Answer 12

You're welcome :)

Answer 13

What is the degree of each monomial?

7m6n5
A. 5

B. 11

C. 6

D. 7

Answer 14

how do you firgure out the degrees?