The correct option is A √2u2+3v2−(52)uv+2
Concept–––––––––:
Net exponents of variables in a polynomial is a whole number.
Method–––––––––:
u2+3v2−(52)uv+2
Each of the terms in this expression has a whole number exponent. So, this is a polynomial expression.
Exponents of variables, on the other hand, are not a whole number when we consider additional choices.