1.

Expand the following using suitable identity (3m-2n)³​

Answer»

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



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