已知x+y=12,xy=9,x＜y,求(x^0.5 -y^0.5)/(x^0.5 +y^0.5)的值
已知x+y=12,xy=9,x＜y,求(x^0.5 -y^0.5)/(x^0.5 +y^0.5)的值
RT
RT
数学人气：605 ℃时间：2020-04-04 04:45:06
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(x^0.5 -y^0.5)/(x^0.5 +y^0.5)
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