Question

x2y2-2xy+1 factorise​

Answer 1

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• Factorise ${x}^{2} {y}^{2} - 2xy + 1$

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${x}^{2} {y}^{2} - 2xy + 1$

$= {(xy)}^{2} - 2 \times (xy) \times 1 + {(1)}^{2}$

$= {(xy + 1)}^{2}$

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• ${(xy + 1)}^{2}$