Respuesta :

Answer:

(x+4)²(x-4)

Step-by-step explanation:

x³+4x²-16x-64

x²(x+4)-16(x+4)

(x+4)(x²-16)

Rewrite (-16) as (-4²)*

(x+4)(x²-4²)

(x+4)(x+4)(x-4)

(x+4)²(x-4)

Hope it helps! :) ~

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good job