X-9y/6xy^2-x+3y/9x^2ykk

问题描述:

X-9y/6xy^2-x+3y/9x^2y
kk

答:
楼主,分子分母究竟是什么啊?
(x-9y)/(6xy²)-(x+3y)/(9x²y)
=1/(6y²)-3/(2xy)-1/(9xy)-1/(3x²)
=1/(6y²)-1/(3x²)-29/(18xy)