Find f(g(x)) how do you find g(x) = 2x^2 + 4 and f(x) = x-2/4 ?

Question

Find f(g(x)) how do you find  g(x) = 2x^2 + 4 and f(x) = x-2/4 ?

anonymous · Answer

replace the x in f(x) with 2x^2 + 4

anonymous · Answer

Then simplify

anonymous · Answer

okay so do 2x^2+4-2/4?

anonymous · Answer

$$f(x) = x - \frac{2}{4}\ = x- \frac{1}{2}$$
$$f((g(x)) = ( 2x^2 + 4 ) - \frac{1}{2} $$

Unless you didn't write f(x) correctly and meant...
$$f(x) = \frac{(x-2)}{4}$$
(Note: if that's what you meant to write, then you HAVE TO make use of parenthesis or order of operations takes precedence and division goes first before subtraction)

anonymous · Answer

hahah @agentx5 you were just helping me out.. thats funny! @noniebug is my sister :)

anonymous · Answer

^_^

anonymous · Answer

hehe i need help. im not a smart girl :(

anonymous · Answer

no it has no "()" around it..

anonymous · Answer

its just x-2/4..

anonymous · Answer

I hope this makes sense then, missed parenthesis causing order of operations not to be what people intended is the #1 syntax error people probably make on this section of the website.  But it's very important if people are trying to answer, because it can completely change what was meant, as you can see from above: 2/4 reduces to a half.

Think of it this way:
g squares the input, then doubles it, then adds four
f subtracts whatever the input is by one half

Best answer?  :D

anonymous · Answer

oh my gosh. like i said im not a smart girl so i hardly got any of that :/ haaa.

anonymous · Answer

What part are you having trouble understanding?

anonymous · Answer

the whole thing..

anonymous · Answer

i already forgot what question i askedd...