Question

f(x) = x2 − 13 and g(x) = x + 5. What is the value of f[g(−4)]?

Answer 1

@qam2k @whpalmer4 @wyattp17 @wtbryant @Whiplash1994 @wakoff @e.cociuba @razor99

Answer 2

@xoya

Answer 3

first substitute the x for -4 on the g(x)

Answer 4

what do you get?

Answer 5

f(-4)=(-4)2-13(-4)=(-4)+5

Answer 6

it was only on g(x)

Answer 7

?





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Answer 8

ok, let start again, substitute on g(x) the x for -4, so you have

g(x) = x + 5
g(x) = -4 + 5
so
g(x) = 1

Answer 9

now that you have g(x) =1, then substitute the 1 for x on f(x)

Answer 10

ok
I did that

Answer 11

so what answer did you get

Answer 12

hold on

Answer 13

-21?

Answer 14

nope

Answer 15

f(x) = x^2 - 13
f(x) = (1)^2 -13 = ???

Answer 16

-12?

Answer 17

good job, so the value of f[g(-4)] = -12

Answer 18

ty

Answer 19

yw :)