Question

Ayuda!!!!!! Factorizar: $x^{4} -5x^{2} +4$

Answer 1

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$= {x}^{4} - {5x}^{2} + 4$

$= ( {x}^{2} - 4)( {x}^{2} - 1)$

$= (x + 2)(x - 2)(x + 1)(x - 1)$