Select all expressions that are squares of linear expressions. Responses A x2+6x+36 x squared plus 6 x plus 36 B (12x+4)2 open paren 1 half x plus 4 close paren squared C (2d+8)(2d−8) open paren 2 d plus 8 close paren times open paren 2 d minus 8 close paren D p2−6p+9 p squared minus 6 p plus 9 E x2+36 x squared plus 36 F 9x2−36 9 x squared minus 36