Question

Factorise (X²-2xy+y²) - z² using identities

Answer 1

${\huge {\underline {\underline {\mathfrak {\red {AnSwEr}}}}}}$

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$= ({x}^{2} - 2xy + {y}^{2} ) - {z}^{2} \\ = ( {x} - {y})^{2} - {z}^{2} \\ =( x - y - z)(x - y + z)$

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