x+6y=5根号xy
x+6y-5根号xy =0
(√x-2√y)(√x-3√y)=0
√x-2√y=0 或 √x-3√y=0
(1) √x-2√y=0 √x=2√y x=4y
x+根号xy+2y分之2x+根号(xy-y)
=(8y+2y-y)/(4y+2y+2y)
=9/8
(2)√x-3√y=0 √x=3√y x=9y
x+根号xy+2y分之2x+根号(xy-y)
=(9y+3y-y)/(9y+3y+2y)
=11/14为什么2x+根号(xy-y)=(8y+2y-y)抱歉看错了看成2x+根号(xy)-y=(8y+2y-y)那应该是多少不知道这里2x+根号(xy-y)是否有误,一般情况应该是齐次式所以我猜测是这个2x+根号(xy)-y式子请看原题是不是这样……你认为题目出错了吗个人感觉,即-y在根号外