SOLUTION: This question stumps me. The way I solved it was using the foil method but I didn't get it right. f(x) = x+1 g(x) = x^2+4 A) (f*g)(x) B) (g*f)(x) C) (f*f)(x) D) (g*g)(x)

Algebra ->  Functions -> SOLUTION: This question stumps me. The way I solved it was using the foil method but I didn't get it right. f(x) = x+1 g(x) = x^2+4 A) (f*g)(x) B) (g*f)(x) C) (f*f)(x) D) (g*g)(x)       Log On


   

Question 1184872: This question stumps me. The way I solved it was using the foil method but I didn't get it right.
f(x) = x+1
g(x) = x^2+4
A) (f*g)(x)
B) (g*f)(x)
C) (f*f)(x)
D) (g*g)(x)
The answers I got were,
A) x^3+x^2+4x+4
B) x^3+x^2+4x+4
C) x^2+2x+1
D) x^4+8x^2+16
Do we have to supply a point for X or am I just thinking way too hard into it?
Also, the way we have to write the function is from largest degree to the smallest degree, for example, 2x^2-4x+5, and I thought I did that but my answers are probably just wrong. :/
Answer by greenestamps(13209) About Me  (Show Source):
You can put this solution on YOUR website!


Your answers are fine.

If you were asked to find, for example (f*g)(3), then you would of course need to use the given value of x to find the answer. But they didn't ask you to evaluate any of the functions for a particular value of x.