Question

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factorise : x^2 - 2xy + y^2 - z^2

Answer 1

Answer:

(x-y)^2 -z^2

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

(x 2 −2xy+y 2 )−z 2

⇒[x(x−y)−y(x−y)]−z 2

⇒(x−y)(x−y)−z 2

⇒(x−y) 2 −z 2

⇒[(x−y)+z][(x−y)−z]

⇒(x−y+z)(x−y−z)

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