Question

expand each of the following, using suitable identities.
(x-2/3y)^3

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Answer 1

hope it will help u..........

Answer 2

Step-by-step explanation:

Here you see that (x - 2y/3)is in the form of (a-b)³

so, the identity of (a-b)³=a³-b³-3ab(a-b)

therefore, (x-2y/3)³=x³-(2y/3)³-3.x.2y/3(x-2y/3)

(x-2y/3)³=x³-8y³/27 -2xy(x-2y/3)

(x-2y/3)³=x³-8y³/27 -2x²y+4xy²/3

hope it will help you!!!