Respuesta :

f(-9) = -(-9)2 - 4(-9) - 19
= 18 + 36 - 19
= 35

f(-9) = 35
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Answer:

f(-9) = -64

Step-by-step explanation:

f(x) = -x^2 - 4x - 19

f(-9) = -(-9)^2 - 4(-9) - 19

f(-9) = -81 + 36 - 19

f(-9) = -64

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