Respuesta :

sentthurskv
Here is the process you can follow to get the real zeroes....

x³ + 6x² - 9x - 54
(x³ + 6x²) + (-9x - 54)
x²(x + 6) + (-9)(x+6)
(x² - 9)(x + 6)
(x + 3)(x - 3)(x + 6)

The zeroes are -3, 3, and -6

I hope this helps you :D

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