papasuiiy papasuiiy
  • 17-09-2017
  • Mathematics
contestada

Evaluate ƒ(x) = –x2 – 4 for x = –3.


a. –13


b. –1


c. –9


d. 1

Respuesta :

cantmember
cantmember cantmember
  • 17-09-2017
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 Link
temp102 temp102
  • 17-09-2017
remember order of operations
substitute -3 for x
[tex]f(-3)=-(-3)^2-4[/tex]
[tex]f(-3)=-(9)-4[/tex]
[tex]f(-3)=-9-4[/tex]
[tex]f(-3)=-13[/tex]

answer is A
Answer Link

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