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Preeti Tripathi

Class 9th
Maths
2 years ago

Factorise : 1 – 2ab – (a2 + b2).

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Abhishek Mishra

2 years ago

Solution: 1 – 2ab – (a2 + b2) = 1 – (a2 + b2 + 2ab) = 12 – (a + b)2 = (1 + a + b) (1 – a – b) [∵ x2 – y2 = (x + y)(x – y)]

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