Hello there,
Given the question "Which algebraic expression is a polynomial with a degree of 2?."
A polynomial is an expression consisting of variables and coefficients, that involves only the operations of addition, subtraction, multiplication, and non-negative integer exponents of variables.
The degree of a polynomial is the highest exponent of the terms of the polynomial.
For option 1: It contains no fractional or negative exponent, hence it is a polynomial. But the highest exponent of the terms is 3, hence it is not of degree 2.
For opton 2: It contains a fractional exponent which violates the definition.
For this Answer it would be B.
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