Question

find the cube of each of the following binomial expressions (2a+b)​

Answer 1

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✴️$\sf (2a+b){}^{3}$✴️

$\sf \implies 2a{}^{2}+b{}^{2}+3×2a×b(2a+b)$

$\sf \implies 8a{}^{3}+b{}^{3}+6ab(2a+b)$

$\sf \implies 8a{}^{3}+b{}^{3}+12a{}^{2}b+6ab{}^{2}$