(x的平方y+xy-6y)/(2x的平方y+6xy)约分哪,
问题描述:
(x的平方y+xy-6y)/(2x的平方y+6xy)约分哪,
答
(x^2y+xy-6y)/(2x^2y+6xy)
=y(x^2+x-6)/[2xy(x+3)]
=y(x+3)(x-2)/[2xy(x+3)]
=y(x-2)/[2xy]
=(x-2)/2x