Question

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

Not sure if I got it wrong or right but can you show me your solutions?

Answer 1

g(f(x)) = g(x^2 + x + 3)
= -1 + (x^2 + 2x + 3)
= ??

Is my starting right or wrong?

Answer 2

g(f(x)) = g(x^2 + x + 3)
= -1 + 2(x^2 + x + 3)

Answer 3

you did not distribute the 2 through for every ter,

Answer 4

term*

Answer 5

oh wait so you mean like

-1 + (2x^2 + 2x + 6) ??

Answer 6

yes

Answer 7

any place we see an x in 2x-1 we put x^2 + x +3
so
2(x^2+x+3)-1
2x^2+2x+6-1
2x^2+2x+5

Answer 8

OH OK! thanks lots!

Answer 9

np