Question

let f(x)=x^2+x-3 and g(x)=2x+4. Find g(-1) and f(g(-1))

Answer 1

Well, g(-1) = -2 + 4 = 2

Agreed?

So now f(g(-1)) = f(2) = ....

Answer 2

yes

Answer 3

f(x) is just short hand for x*x + x -3 (because math people don't like to type)
every where you see an x, replace it with 2 to get f(2)

Answer 4

thanks

Answer 5

what did you get?

Answer 6

g(-1)=2 and f(g(-1))=3

Answer 7

is that right?

Answer 8

yes

Answer 9

:) thanks hun