Question

Can someone please help me?

Given ƒ(x) = x2 + 4 and g(x) = 5x − 3, find (ƒ ○ ƒ)(x)

I got (fof)(x) = 5x^2+20 but i'm not sure it's the right answer

Answer 1

@geerky42 do I do x^2(x^2+4)4 for this one?

Answer 2

Given ƒ(x) = x^2 + 4 and g(x) = 5x − 3, find (ƒ ○ ƒ)(x)

Answer 3

No. You plug \(x^2+4\) into x.

So you should have \((f\circ f)(x) = f(~f(x)~) = (x^2+4)^2+4\)