Question

(1/3x+2/3y)3
Expand it using suitable identities

Answer 1

Answer:

1/9x^2 + 4/9y^2 + 4/9xy

Step-by-step explanation:

Identity used = (a+b)^2

= (1/3x + 2/3y)^2

= {(1/3x)^2 + (2/3y)^2 + (2* 1/3x* 2/3y)}

= (1/9x^2) + (4/9y^2) + (4/9xy)

= 1/9x^2 + 4/9y^2 + 4/9xy

So, this is the answer.

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Answer 2

Answer:

In this question we can use identity - (x-y)^3= x^3-3x^2y+3xy^2-y^3.

by using this identity we can solve this question.