Factorise completely : x2 – y2 – 2x + 2y

1.	Factorise completely : x2 – y2 – 2x + 2y
Answer» x² – y² – 2x + 2y = (x² – y²) - 2(x - y) = (x + y) (x - y) - 2(x - y) = (x - y) (x + y)- 2)

Answer»

x² – y² – 2x + 2y = (x² – y²) - 2(x - y)

= (x + y) (x - y) - 2(x - y)

= (x - y) (x + y)- 2)

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