SOLUTION: If f(x)=x² and g(x)= 3x-4, find (gºf)(x) Here;s what I am getting: (gºf)(x) → g(f(x)) g(x²) I am confused as to if the answer would be 3x³- 4x² or w

Algebra ->  Functions -> SOLUTION: If f(x)=x² and g(x)= 3x-4, find (gºf)(x) Here;s what I am getting: (gºf)(x) → g(f(x)) g(x²) I am confused as to if the answer would be 3x³- 4x² or w      Log On


   

Question 949840: If f(x)=x² and g(x)= 3x-4, find (gºf)(x)
Here;s what I am getting:
(gºf)(x) → g(f(x))
g(x²)

I am confused as to if the answer would be 3x³- 4x² or would I just simply substitute x² making the answer 3x²-4
Found 2 solutions by jim_thompson5910, Alan3354:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
g(x) = 3x - 4

g(f(x)) = 3*( f(x) ) - 4 ... replace EVERY x with f(x)

g(f(x)) = 3*( x^2 ) - 4 ... replace f(x) on the right side with x^2

So, g(f(x)) = 3x^2 - 4

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
If f(x)=x² and g(x)= 3x-4, find (gºf)(x)
Here;s what I am getting:
(gºf)(x) → g(f(x))
g(x²)

I am confused as to if the answer would be 3x³- 4x² or would I just simply substitute x² making the answer 3x²-4
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If f(x)=x^2 and g(x)= 3x-4, find (gºf)(x)
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Wherever you see an x, sub f(x) with is x^2
g(x^2) = 3x^2 - 4