Simplify completely quantity 8 x minus 56 over quantity x squared minus 49 divided by quantity x minus 6 over quantity x squared plus 11 x plus 28. 4 open parentheses x plus 4 close parentheses over quantity x minus 3 8 open parentheses x plus 2 close parentheses over quantity x minus 3 8 open parentheses x plus 4 close parentheses over quantity x minus 7 8 open parentheses x plus 4 close parentheses over quantity x minus 6