Question

expand the following using suitable identity
(За – 2b)³​

Answer 1

Answer:

ANSWER IS

identity is (a-b) ³=a³-b³+3a(-b) (a-b)

(3a)³– (2b)³ – 3(3a)(2b) [3a – 2b]

=27a³ – 8b³ – 18ab (3a – 2b)

= 27a³ – 8b³ – 54a²b + 36ab²

= 27a³– 54a²b + 36ab²– 8b³

HOPE IT HELPS

Answer 2

Answer:

=> (3a-2b)³

=> (3a)³-(2b)³-3(3a)(2b)(3a-2b)

=> 9a³-8b³-54a²b+36ab²

This is your answer..✌️✌️