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