Find g(f(x)) f(x)=x^2+9 , g(x) = square root of x-9

Math
,
Set up the composite result function.
Evaluate by substituting in the value of into .
Subtract from .
Add and .
Pull terms out from under the radical, assuming positive real numbers.
Find g(f(x)) f(x)=x^2+9 , g(x) = square root of x-9
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