Please I Need Help With These Polynomial Function?

Question

(a) f(x)= (9 - x^2)/5 

(b) f(x)= -8x^3 + 2x^2 - 7 

(c) f(x)= -15x^3 + πx^2 - 5/9 

(d) f(x)= x^3/2 - x^5 - 5 

state if it's a poly. function or not and to what degree

Answer 1

a) yes, 2nd

b) yes, 3rd

c) yes, 3rd

d) no.