Question

f(x)=x-1
g(x)=2x^2-2x-5
Find g(f(x))
@Jhannybean

Answer 1

\[\large g(x) = 2x^2 -2x -5\]\[\large f(x) = x-1 \] now take the function of g(x) and wherever you see an "x" in that function, replace it with the "f(x)" formula \[\large g(f(x)) = 2(x-1)^2 -2(x-1) -5\]Can you solve this now? :)

Answer 2

*f(x) function* not formula, sorry about that.

Answer 3

2x^2-6x-1?

Answer 4

Good job :D

Answer 5

I still don't really feel %100 on these, and I have 8 more like this lol

Answer 6

Like the substitution ones?

Answer 7

like the ones we just did.......

Answer 8

ah. Then just follow the same method we used here. Just for practice,could you tellme how you would find \(\large f(g(x))?\)

Answer 9

multiply g*x and then multiply the result * f?

Answer 10

No we would just take the original g(x) function and input it into f(x) like so \[\large f(g(x)) = (2x^2-2x-5)-1\]

Answer 11

sorry had to let the dogs out

Answer 12

no problem, lol