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

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Solution

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

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(5 a - 3 b)^{2} - 16 b^{2}

Factorise:
$121 a^{2} - 88 a b + 16 b^{2}$

25 a^{2} + 40 a b + 16 b^{2}

Factorise Completely : $a^{2} - 16 b^{2} - 2 a - 8 b$

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