Here, given polynomial is
3x5−7x4+2x3−6x+9.
i) A quantity representing the power to which a given number or expression is to be raised, is called an exponent.
So, exponent of −6x is 1.
ii) The highest power of the variable that occurs in a polynomial is called the degree of the polynomial.
Thus, 5 is the degree of the given polynomial.
iii) Constant term is a term in a polynomial whose value cannot be changed. Thus, constant term in 3x5−7x4+2x3−6x+9 is 9.