Respuesta :

Answer:

H^2+9H+23

Step-by-step explanation:

f(3+h)=(3+H)^2+3*(3+H)+5

       =9+6H+H^2+9+3H+5

       =H^2+9H+23

Answer:

f(3+h)=(3+h)²+3(3+h)+5=9+6h+h²+9+3h+5=h²+9h+23

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