计算:(根号下x+xy-根号下xy)(根号下y+y²+y)(x>0,y>0);

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计算:(根号下x+xy-根号下xy)(根号下y+y²+y)(x>0,y>0);计算:(根号下x+xy-根号下xy)(根号下y+y²+y)(x>0,y>0);计算:(根号下x+xy-

计算:(根号下x+xy-根号下xy)(根号下y+y²+y)(x>0,y>0);
计算:(根号下x+xy-根号下xy)(根号下y+y²+y)(x>0,y>0);

计算:(根号下x+xy-根号下xy)(根号下y+y²+y)(x>0,y>0);
[√(x+xy)-√(xy)][√(y+y²)+y]
=√x[√(1+y)-√y]√y[√(1+y)+√y]
=√(xy)(1+y-y)
=√(xy)

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