Factor negative 7 x cubed plus 21 x squared plus 3 x minus 9 by grouping. What is the resulting expression?
A
open paren 7 x minus 3 close paren times open paren 3 plus x squared close parenB
open paren 7 x squared minus 3 close paren times open paren 3 plus x close parenC
open paren 3 minus 7 x squared close paren times open paren x minus 3 close parenD
open paren 3 minus 7 x close paren times open paren x squared minus 3 close paren