Factorise- 2-1-2 b-b2

A2 1+2b b2 = a2 (1 2b+b2) = a2 (1 b)2 = (a+(1 b))(a (1 b)) = (a+1 b)(a 1+b) ...

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Factorisation by Common Factors

Factorise: 2-...

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Factorise: a²-1+2b-b²

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