Answer :
The given function is
[tex]f(x)=-x^2+5x+15[/tex]The expression f(9) means we have to evaluate the function when x = 9.
[tex]f(9)=-(9)^2+5(9)+15=-81+45+15=-21[/tex]
The given function is
[tex]f(x)=-x^2+5x+15[/tex]The expression f(9) means we have to evaluate the function when x = 9.
[tex]f(9)=-(9)^2+5(9)+15=-81+45+15=-21[/tex]