SOLUTION: (f o g)(X) f(x)=3x^2-8x g(x)=2x I know the answer I don't know how understand how. I got this: 6x^2-16x I know it is not correct. This is the answer: 12x^2-16x I do not und

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Question 1059229: (f o g)(X)
f(x)=3x^2-8x
g(x)=2x
I know the answer I don't know how understand how.
I got this: 6x^2-16x I know it is not correct.
This is the answer: 12x^2-16x
I do not understand how that is the answer.
Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39620)   (Show Source): You can put this solution on YOUR website!
That first expression which should really be written , tells that g is the input of f. This is function composition. The function means the function f is given the function g as its input. The notation can be written also as .

NOW you understand and know what to do! Simplify the composition.
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

(f o g)(X)
f(x)=3x^2-8x
g(x)=2x
I know the answer I don't know how understand how.
I got this: 6x^2-16x I know it is not correct.
This is the answer: 12x^2-16x
I do not understand how that is the answer.
                  g(x) = 2x

 

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