Answer :

Final answer:

The leading coefficient of the polynomial is 23, and the degree of the polynomial is 8.

Explanation:

The leading coefficient is the coefficient of the term with the highest degree in the polynomial. In this case, the polynomial is 7x5 + 4x6 + 23x8 - 9x. The highest degree term is 23x8, so the leading coefficient is 23.

The degree of a polynomial is the highest exponent of the variable in the polynomial. In this case, the highest degree term is 23x8, so the degree of the polynomial is 8.

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