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Question
Factorise: (5a - 2b)2 - (2a - b)2
Sum
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Solution
(5a - 2b)2 - (2a - b)2
= (5a - 2b + 2a - b) (5a - 2b - 2a + b)
= (7a - 3b) (3a - b)
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Factorisation by Difference of Two Squares
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