Answers

2016-03-23T09:59:26+05:30
Hello !
x² - y² - 2y + 1
⇒ x² - y² -2×y×1 + 1²
⇒ x² - (y-1)²
(x - y +1)(x-y-1)
I hope the answer is correct !
Happy Holi ! 
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