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For functions 

f ( x) = 7x − 8

  and  

g ( x) = 7x + 8,

  find the following. ( Simplify your answers completely.)

(a)

( f  · g ) (x) = 

 

 

(b)

( f  · g ) (−2)

 Apr 19, 2020
 #1
avatar+20810 
+1

f(x)  =  7x - 8     and     g(x)  =  7x + 8

 

(f · g)(x)  =  f(x) · g(x)  =  (7x - 8) · (7x + 8)  =  49x2 - 64

 

(f · g)(-2)  =  49(-2)2 - 64  =   132

 Apr 19, 2020

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