Factorise: (5a - 3b)^2 - 16b^2 - Vidyadip

Question

Factorise: $(5a - 3b)^2 - 16b^2$

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Answer

$(5a - 3b)^2 - 16b^2$
$= (5a - 3b)^2 - (4b)^2$
$= (5a - 3b + 4b) (5a - 3b - 4b)$
$= (5a + b) (5a - 7b)$

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