Answer
$6a^{2}-7ab-5b^{2}$
Work Step by Step
$(2a+b)(3a-5b)$
=$2a(3a-5b)+b(3a-5b)$
=$6a^{2}-10ab+3ab-5b^{2}$
=$6a^{2}-7ab-5b^{2}$
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