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5x⁴ - 1 - x² - 3
5x⁴ - x² - 4
5x² 4
x² - 1
(5x² + 4)(x² - 1)
(5x² + 4)(x - 1)(x + 1)
UNO DE LOS FACTORES ES: x + 1
ESO ES TODO, SALUDOS..................