we know that
An polynomial is an expression of more than two algebraic terms, especially the sum of several terms that contain different powers of the same variable
option-A:
[tex] 8x-z^3 [/tex]
since, there are two variables
so, this can not be polynomial
option-B:
[tex] x-1 [/tex]
Since, there is a only one variable
so, this is a polynomial
option-C:
Since, there is sqrt
and in polynomial exponent can not be fraction
so, this is not polynomial
option-D:
[tex] 6+p [/tex]
since, there is only one variable
so, this is polynomial
