(2x/3y²)²÷(-x/y)³

问题描述:

(2x/3y²)²÷(-x/y)³

(2x/3y²)²÷(-x/y)³
=(4/9*x^2/y^4)÷(-x^3/y^3)
=-4/9*x^2/y^4*y^3/x^3
=-4/(9xy)