SOLUTION: Find the following f[g(x)] if f(x)=3x-7 and g(x)=x^3-2x^2-x+1

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Question 427423: Find the following f[g(x)] if f(x)=3x-7 and g(x)=x^3-2x^2-x+1
Answer by John10(297) About Me  (Show Source):
You can put this solution on YOUR website!
Find the following f[g(x)] if f(x)=3x-7 and g(x)=x^3-2x^2-x+1
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We know that f(x) = 3x - 7
To find (fog)(x)= f(g(x))= f(x^3-2x^2-x+1) = 3(x^3-2x^2-x+1) - 7
= 3x^3 -6x^2 -3x -4
The above step just replace x by g(x).