( 2a - b ) * ( 4a2 + 2ab + b2 )

(2а-b)*(4a²+2ab+b²)=8a³+4a²b+2ab²-4a²b-2ab²-b³=8а³+4a²b-4a²b+2ab2-2ab²-b³=8a³-b³ Ответ 8а³-b³