Question

I really need help..

Let f(x) = 2x+3 and g(x) = x2

Part 1 Find f(g(x))
Part 2 Find g(f(x))
Part 3 Use complete sentences to explain any difference in part 1 and part 2.

Answer 1

replace the x in f(x) by x^2 gives f(g(x))
part2 do the reverse for g(f(x))

Answer 2

mmmmm ok ill try

Answer 3

good - in maths its best to learn stuff by trying things yourself

Answer 4

2(x^2) + 3
2x^2 + 3

(2x + 3)^2
4x² + 12x + 9


plug g(x) into f(x)
plug f(x) into g(x)

Answer 5

part 1-3 is that good
?

Answer 6

oh wait i got it thanks
!

Answer 7

very good - both spot on