Ответ:
формула(a-b)³
=a³-b³-3ab-(a-b)
=3mn³-5n³-3×3mn×5n(3mn-5n)
=mn³-125n3-45mn m(3mn-5n)=21mn³-125n³-125n³-135mn²n-225mn²
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Ответ:
формула(a-b)³
=a³-b³-3ab-(a-b)
=3mn³-5n³-3×3mn×5n(3mn-5n)
=mn³-125n3-45mn m(3mn-5n)=21mn³-125n³-125n³-135mn²n-225mn²