-12x^3y^4÷(-3x^2y^3)·(-1/3x^2y)=?是多少

问题描述:

-12x^3y^4÷(-3x^2y^3)·(-1/3x^2y)=?是多少

-12x^3y^4÷(-3x^2y^3)·(-1/3x^2y)
=4xy·(-1/3x^2y)
=-4/3x^3y^2