Respuesta :

sqdancefan

Answer:

  a) -12x -3

  b) 12x +9

Step-by-step explanation:

Put the argument into the function expression and simplify.

a) f(-x) = 12(-x) -3 = -12x -3

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b) f(x+1) = 12(x+1) -3 = 12x +9