Question

Expand by using suitable identity.​

Answer 1

( x / 3 - 2y / 3 ) ³

4xy² / 9 - 2yx² / 9 + x³/ 27 - 8y³/ 27

Answer 2

Answer:

$( { \frac{x}{3} - \frac{2y}{3} ) }^{3} = ( { \frac{ x - 2y}{3} )}^{3} = ( \frac{x - 2y}{3})( { \frac{x - 2y}{3}) }^{2} = ( \frac{x - 2y}{3} )( \frac{ {x}^{2} + 4 {y}^{2} - 4xy }{9} )$

that's is your answer