Question

Just need your help!!
Use f(x)=2x-3 and g(x)=1-x^2 to evaluate the following expressions.
(f g)(-8)

Answer 1

I research your problem and think this might help...

http://mathforum.org/library/drmath/view/72064.html

Answer 2

@Mimi_x3

Answer 3

f(g(-8))
This is called composite functions .. we work from the right to the left or innermost function first ... Lets focus on the g(-8)
Ok our first step is to take our function of g(x) and replace every x with -8
So g(-8)=1-(-8)^2
Solve for g(-8)

Answer 4

g(-8)= -63

Answer 5

@Mimi_x3

Answer 6

Hey sorry .. got busy

Answer 7

Ok now g(-8)=-63
Sooo we can replace the g(-8) with -63
Therefore f(g(-8)) =f(-63)
So now the next step would be to replace every x in our function f with -63

Answer 8

is it multiplication or a composition?
(fg)(x) should mean f(x)*g(x) I belive
and
f(g(x)) is f composed with g

Answer 9

hmmm you are mostprobably right lol

Answer 10

so what do I have to do know

Answer 11

ummm Im more and more leaning to what freckles said

Answer 12

so know do I have to solve for f

Answer 13

Hey can you do me a favour and draw out the symbol of (f*g)(-8)
What sign is in btwn the f and g????

Answer 14

I guess there is a degree sign