Factorise by using formula: $(5 a - 2 b)^{2} - (2 a - b)^{2}$

(7 a - 3 b) (3 a + b)

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(7 a - 3 b) (3 a - b)

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(7 a + 3 b) (3 a - b)

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(7 a + 3 b) (3 a + b)

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Solution

The correct option is B $(7 a - 3 b) (3 a - b)$
$F a c t o r i z i n g {(5 a - 2 b)}^{2} - {2 a - b}^{2}, = (5 a - 2 b + 2 a - b) (5 a - 2 b - 2 a + b) = (7 a - 3 b) (3 a - b)$

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