Question

factorise x² - 2xy + y2 - 2?​

Answer 1

Step-by-step explanation:

x²-2xy+y²-2

(x-y)²-2 [(x-y)²=x²-2xy+y²]

(x-y)²-(√2)²

(x-y+2)(x-y-2) [x²-y²=(x+y)(x-y)]

Hope it helps