Question: is 2x a polynomial function?
Answer: For example, in x2 + 2x + 1 the term 2x is a linear term in a quadratic polynomial. The polynomial 0, which may be considered to have no terms at all, is called the zero polynomial. Unlike other constant polynomials, its degree is not zero. ... For example, x3y2 + 7x2y3 − 3x5 is homogeneous of degree 5.