SOLUTION: I need help with solving this problem: Directions: Let f(x)=x^2 and g(x)=3x+7. Find the following composites. #1. f(g(-2)) #2. f(g(x)) I have tried solving them over a

Question 701650: I need help with solving this problem:
Directions: Let f(x)=x^2 and g(x)=3x+7. Find the following composites.
#1. f(g(-2))
#2. f(g(x))
I have tried solving them over and over, but I keep getting the wrong answer. For #1 I get -2x^2. For #2 I get 3x^3+7x^2. I know those answers are not right and I need help, please!
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Let f(x)=x^2 and g(x)=3x+7. Find the following composites.
#1. f(g(-2))
g(-2) = 3*-2+7 = 1
f(1) = 1
---------------
#2. f(g(x))
= f(3x+7)
= 9x^2 + 42x + 49

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