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Find the Requested Composition of Functions f(x)=x2+8f ( x ) = x ^ { 2 } + 8

Question 59

Multiple Choice

Find the requested composition of functions.
-Given f(x) =x2+8f ( x ) = x ^ { 2 } + 8 and g(x) =x2−8g ( x ) = x ^ { 2 } - 8 , find fg(x) f g ( x ) .


A) x4−16x2+72x ^ { 4 } - 16 x ^ { 2 } + 72
B) x4+16x2+72x ^ { 4 } + 16 x ^ { 2 } + 72
C) x4+16x2+56x ^ { 4 } + 16 x ^ { 2 } + 56
D) x4−16x2+56x ^ { 4 } - 16 x ^ { 2 } + 56

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