x05y+2xy05分之x05+3xy+2y平方
=(x²+3xy+2y²)/xy(x+2y)
=(x+y)(x+2y)/xy(x+2y)
=(x+y)/xy
=12/9
=4/3
已知x+y=12,xy=9,求x05y+2xy05分之x05+3xy+2y平方
已知x+y=12,xy=9,求x05y+2xy05分之x05+3xy+2y平方
数学人气：388 ℃时间：2019-08-20 12:14:21
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