Write the following cubes in expanded form
$(2 a-5 b)^{3}$
Write the following cubes in expanded form
$(2 a-5 b)^{3}$
$=(2 a)^{3}-(5 b)^{3}-3(2 a)(5 b)(2 a-5 b)$
$=8 a^{3}-125 b^{3}-30 a b(2 a-5 b)$
$=8 a^{3}-125 b^{3}-60 a^{2} b+150 a b^{2}$
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