Which expression is not a polynomial?

-+2 is not a Polynomial,This one is a radical term.

Explanation:

A polynomial can own:

That can be joined utilizing the four operations (+,-,*,/)

So: A polynomial can have, variables, constants, and exponents,

but  a variable can divide.

Also, they can have one or more terms, but not an endless number of cycles.

vx is not, because the exponent is "½" (see fractional exponents).

bc blah

explanation:

bc blah

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.