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Question
Factorise the following:
b2 - 2bc + c2 - a2
Sum
Solution
b2 - 2bc + c2 - a2
= (b2 - 2bc + c2) - a2
= (b - c)2 - (a)2
= (b - c - a)(b - c + a).
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Method of Factorisation : Difference of Two Squares
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