Question

expand (x-2/3y) ^3 using suitable identities​

Answer 1

Answer:

We know the identity ,

( a - b )³ = a³ - 3a²b + 3ab² - b³

Here ,

(x-2/3y)³=x³-3x²(2y/3 )+3x(2y/3)²-(2y/3)³

= x³ - 2x²y + 4y²/3 - 8y³/27

Hope it helps you!!