SOLUTION: Pleaseeee helpppp! I have absolutely no idea what to do. if f(x) = x^2 and g(x) = x + 2, find f(g(x))

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Pleaseeee helpppp! I have absolutely no idea what to do. if f(x) = x^2 and g(x) = x + 2, find f(g(x))      Log On


   

Question 764276: Pleaseeee helpppp! I have absolutely no idea what to do.

if f(x) = x^2 and g(x) = x + 2, find f(g(x))
Answer by Cromlix(4381) About Me  (Show Source):
You can put this solution on YOUR website!
f(x) = x^2 g(x) = x + 2
f(g(x)) means where you see x
in the f(x) equation, you replace it with
the g(x) equation
f(x) = x^2
So make a bracket round
x + 2 and square it
=(x + 2)^2.
If say f(x) was 4x + 2
and g(x) was 5x
f(g(x)) would be:
4(5x) + 2
20x + 2.
Hope this helps, but if not
just post another question.
:-)