Question

a² -1 -2x - x² factorise​

Answer 1

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• Factorise ${a}^{2} - 1 - 2x - {x}^{2}$

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${a}^{2} - 1 - 2x - {x}^{2}$

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

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

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

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• $(a + x + 1)(a - x - 1)$