(2x/3y)^2÷6x/2y+x^2/2y^2÷2y^2/x

问题描述:

(2x/3y)^2÷6x/2y+x^2/2y^2÷2y^2/x

=4x²/9y²×2y/6x +x²/2y²×x/2y²
=4x/27y+x³/4y^4