SOLUTION: I am not sure if this is where I ask this question. The question asks, "Suppose that f(x)=x^2 and g(x)=3x+1. Find f(g(x)) and f(x-1). I have found f(g(x)). The answer would be (3x+

Algebra ->  Expressions-with-variables -> SOLUTION: I am not sure if this is where I ask this question. The question asks, "Suppose that f(x)=x^2 and g(x)=3x+1. Find f(g(x)) and f(x-1). I have found f(g(x)). The answer would be (3x+      Log On


   

Question 852776: I am not sure if this is where I ask this question. The question asks, "Suppose that f(x)=x^2 and g(x)=3x+1. Find f(g(x)) and f(x-1). I have found f(g(x)). The answer would be (3x+1)^2 and simplified it would be 9x^2+6x+2. I am having trouble setting up the f(x-1). Would that be (x^2-1)^2? I am confused. Thank you so much in advance for your help in this matter.
Found 2 solutions by josgarithmetic, Alan3354:
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
%283x%2B1%29%5E2=9x%5E2%2B3x%2B3x%2B1=9x%5E2%2B6x%2B1.


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Use x-1 in f%28x%29=x%5E2;
f%28x-1%29=%28x-1%29%5E2, continue the multiplication if you want that simplified into general form. You are simply using (x-1) in the input of the function.

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
I am not sure if this is where I ask this question. The question asks, "Suppose that f(x)=x^2 and g(x)=3x+1. Find f(g(x)) and f(x-1). I have found f(g(x)). The answer would be (3x+1)^2 and simplified it would be 9x^2+6x+2. I am having trouble setting up the f(x-1). Would that be (x^2-1)^2?
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f(x)=x^2
f(x-1) --> sub (x-1) for x
f(x-1) = (x-1)^2
f(x-1) = x^2 - 2x + 1