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Question
Factorise : (a + b) 2 - a2 + b2
Sum
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Solution
(a + b) 2 - a2 + b2
= a2 + 2ab + b2 - a2 + b2
= 2ab + 2b2
= 2b( a + b )
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Method of Factorisation : Difference of Two Squares
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