A polynomial is a function of the form;
P(x) = axn+bxn-1+cxn-2+……..+k, where a, b, c…..k are constants.
E.g.
P(x) = x3+2x2-3x+4
G(x) = x4+x3+x2-x+1
H(x) = 2x+5
F(x) = 3x