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For the Given Functions f(x)f(x) And g(x)g(x) , Find a Value xx For Which

Question 129

Multiple Choice

For the given functions f(x) f(x) and g(x) g(x) , find a value xx for which (fg) (x) =(gf) (x) (f\circ g) (x) =(g\circ f) (x) .
- f(x) =x2+9x+7,g(x) =x+2f(x) =x^{2}+9 x+7, g(x) =x+2


A) x=52x=-\frac{5}{2}
B) x=5x=5
C) x=5x=-5
D) x=2\mathrm{x}=2

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