Answer:
-84
Step-by-step explanation:
When you see f(x) is the same as y but if x is replaced with a numerical value, X IS EQUAL TO IT. In this case, use x as -5.
So everytime you see x, replace it with -5 to get your answer.
[tex]-4(-5)^2-5(-5)-9=-84[/tex]
f(x) = -84
