Answer :
The leading coefficient of any degree of a polynomial is the digit that precedes the variable with the highest power
Given the polynomial
[tex]-v-15v^3-v^9+12^{}^{}^{}[/tex]Rearrange the function in standard form
[tex]\begin{gathered} -v^9-15v^3-v+12 \\ \text{the degree of the function is 9} \\ \text{The leading coefficient is -1} \end{gathered}[/tex]The leading coefficient of the polynomial is -1