What is the completely factored form of x to the 4th power plus 8 x squared minus 9 ?
A
open paren x plus 1 close paren times open paren x plus 1 close paren times open paren x plus 3 close paren times open paren x plus 3 close parenB
open paren x squared minus 1 close paren times open paren x plus 3 close paren times open paren x minus 3 close parenC
open paren x plus 1 close paren times open paren x minus 1 close paren times open paren x plus 3 close paren times open paren x plus 3 close parenD
open paren x plus 1 close paren times open paren x minus 1 close paren times open paren x squared plus 9 close paren