Question

Evaluate ƒ(x) = –x2 – 4 for x = –3.


a. –13


b. –1


c. –9


d. 1

Answer 1

f(x)= -2x-4 , x=-3

plug in -3, where ever x appears in the function 

f(-3)=-2(-3)-4

f(-3)=6-4  <-- remember two negatives make a positive when multiplied or divided.

f(-3)=2

........and since this is not an answer, are you sure you copied it down correctly? or can you answer non? 

Answer 2

remember order of operations
substitute -3 for x
$f(-3)=-(-3)^2-4$
$f(-3)=-(9)-4$
$f(-3)=-9-4$
$f(-3)=-13$

answer is A