Expand using forma ( 2m - n)³
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( 2m - n ) ³
Using formula, ( a - b )³ = a³ - b³ - 3ab( a - b )
(2m - n )³
(2m)³ - (n)³ - 3 × 2m × n ( 2m - n)
8m³ - n³ - 12m²n + 6mn².
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⭐Hope it helps :-⭐
Using formula, ( a - b )³ = a³ - b³ - 3ab( a - b )
(2m - n )³
(2m)³ - (n)³ - 3 × 2m × n ( 2m - n)
8m³ - n³ - 12m²n + 6mn².
=================================================
⭐Hope it helps :-⭐
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