36 c^2-(5 a+b)^2 - Vidyadip

Question

$36 c^2-(5 a+b)^2$

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Answer

$(6 c)^2-(5 a+b)^2$
${\left[\because a^2-b^2=(a+b)(a-b)\right\}}$
$=(6 c+5 a+b)(6 c-5 a-b)$

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