En resumen

<img src="https://tex.z-dn.net/?f=%20x%5E%7B3%7D%20-3%20x%5E%7B2%7D%20-4x" /> <img src="https://tex.z-dn.net/?f=x%28%20x%5E%7B2%7D%20-3%20x%20-4%29" /> x(x - 4)(x + 1) explicacion : <img src="https://tex.z-dn.net/?

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<img src="https://tex.z-dn.net/?f=%20x%5E%7B3%7D%20-3%20x%5E%7B2%7D%20-4x" />

<img src="https://tex.z-dn.net/?f=x%28%20x%5E%7B2%7D%20-3%20x%20-4%29" />

x(x - 4)(x + 1)

explicacion :

<img src="https://tex.z-dn.net/?f=x%5E%7B2%7D%20-3x-%204%0A" />

x - 4

x + 1 - 4x + x = - 3x

(x - 4)(x + 1).