Question

please solve this question

Answer 1

I hope this answer is helpful to yuou

Answer 2

(x/3+5y/3)^3=(x/3)^3+(5y/3)^3+3(x/3)^2(5y/3)+3(x/3)(5y/3)^2
=x^3/27+125y^3/27+5x^2y/9+25xy^2/9