SOLUTION: HELP PLEASE! I for some reason can not understand how to figure out this problem. It says " Let f(x)=x^2-9, g(x)=2x The problem is (f+g)(3) I know I just substitute but

SOLUTION: HELP PLEASE! I for some reason can not understand how to figure out this problem. It says " Let f(x)=x^2-9, g(x)=2x The problem is (f+g)(3) I know I just substitute but

Algebra.Com

Question 884881: HELP PLEASE!
I for some reason can not understand how to figure out this problem.
It says " Let f(x)=x^2-9, g(x)=2x
The problem is (f+g)(3)
I know I just substitute but I keep getting it wrong. Hopefully someone can show me how to set up the problem. Thanks
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
What are you doing, and what do you get?
RELATED QUESTIONS
How many horizontal asymptotes does the rational function f(x)=-2x^2/x^2+1 have? I can... (answered by erica65404,richwmiller)

I need help solving this problem. I'm not quite sure that I understand how to do it:... (answered by lwsshak3)

I'm not sure which section this would go under...see, I'm in algebra 3. On my review a... (answered by stanbon)

last question. I have a problem figuring out how to graph the quadratic function. I... (answered by rapaljer)

Please help me to figure this one out and more importantly understand it in laymens... (answered by stanbon,JBarnum)

I have been struggling on how to figure this problem out and I was wondering if someone... (answered by gonzo)

I do not understand where to even begin in a problem like this one. Please help me to... (answered by fcabanski,jsmallt9)

I'm having trouble solving this problem for some reason. I am not understanding how to... (answered by mananth)

i am in desperate need of some help...i do not understand how to do this it confuses... (answered by venugopalramana)