Respuesta :

Answer:

Step-by-step explanation:

hello :

f(X)= -3 x²-7x-9

f(-5)= -3(-5)²-7(-5)-9 = -75+35-9 =-49

f(2) = -3(2)²-7(2)-9=-12-14-9=-35

f(-5)+f(2) = -49 -35 = -84