Which expression is equivalent to open paren 3 x squared minus 7 close paren ?
A
open paren 2 x squared minus 11 close paren minus open paren x squared plus 4 close parenB
open paren 5 x squared minus 6 close paren minus open paren 2 x squared minus 1 close parenC
open paren 15 x squared plus 8 close paren minus open paren 18 x squared plus 1 close parenD
open paren 10 x squared minus 4 close paren minus open paren 7 x squared plus 3 close paren