Math, asked by jennie89, 3 months ago

expand using appropriate identity
(9x-2y)³​

Answers

Answered by pradeepajaganathan
4

Step-by-step explanation:

(a-b)³=a³-3a²b+3ab²-b³

(9x-2y)³=729x³-3(81x²2y)+39x4y²-8x³

= 729x³-486x²y+156xy²-8x³

=721x³-486x²y+156xy²

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