Question

compute (3m-2n ) cube ?
please

Answer 1

the identity is (a-b)³ =a³-3a²b+3ab²-b³
(3m-2n)
=3m³-3(3m)²(2n)+3(3m)(2n)²-(2n)³
=27m³-54m²n+36mn²-8n

Answer 2

(3m-2n)cube




This is similar to
${(a - b)}^{3}$
whoch equals

so the answer is
${9m}^{3} - {4n}^{3} + 18mn(3m - 2n)$