Question

nothing

Answer 1

Fire away!

Answer 2

For the first one, you've got to make a difference of squares function

that could be x squared - some number squared.

right?

Answer 3

see for example

x^2 - 9 = (x-3)(x+3) <- these are the factors

Answer 4

x^2 + 9

Answer 5

this is downright confusing!!

Answer 6

Actualy x^2 + 9 is not that.. thats (x+3i)(x-3i)

Answer 7

yes bingo

Answer 8

just expand a perfect square

(x-2)^2 = x^2 + 4 - 4x

Answer 9

Exactly