Question

75. a4 - a - a2 - 1 factorize it
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Answer 1

Answer:

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Answer 2

Answer ⤵️

${a}^{4} - a - {a}^{2} - 1 \\ ( {a}^{2} {)}^{2} + 2 {a}^{2} - a + 1 \\ ( {a}^{2} {)}^{2} + 2 {a }^{2} + {1}^{2} - {a}^{2}$

$( {a}^{2} + 1 {)}^{2} - {a}^{2}$

$( {a}^{2} + 1 - a) \: \: \: ( {a}^{2} + 1 + a) \\ ( {a}^{2} - a + 1) \: \: ( {a }^{2} + a + 1)$

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