Answer:
[tex] { \boxed{8}}→ { \boxed{constant}} \\ { \boxed{9x}}→{ \boxed{linear}} \\ { \boxed{3 {x}^{2} + 6x}}→{ \boxed{linear}} \\ { \boxed{5x + 4 {x}^{2} }}→{ \boxed{binomial}}[/tex]