Factorise :

$1 - (b - c)^{2}$

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Solution

$1 - (b - c)^{2} = (1)^{2} - (b - c)^{2} = (1 + b - c) (1 - b + c) A n s . {∵ a^{2} - b^{2} = (a + b) (a - b)}$

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