Question

factorise (x² – 2xy + y²) – Z²
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Answer 1

Answer:

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

Answer 2

Answer:

(x^2-2xy+y^2)-z^2

(x-y)^2-z^2

(x-y+z)(x-y-z)