化简求值:(X×根号X+X×根号y)÷(XY-Y²)-(X+根号XY+Y)÷X×根号X-Y×根号Y,其中X=1
化简求值:(X×根号X+X×根号y)÷(XY-Y²)-(X+根号XY+Y)÷X×根号X-Y×根号Y,其中X=1
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
先化简再求值(x-y/1-x+y/1)÷x平方+2xy+y平方/2y,其中x=根号3+2,y=根号3
先化简,在求值:(x+根号xy)/(y+根号xy)+((根号xy)-y)/(x-根号xy),其中x=根号3+1,y=根号
化简:[(x×根号x+x×根号y)/(xy-y²)]-[(x+根号下xy+y)/(x×根号x-y×根号y)]
化简(y根号x+x根号y)/(xy-y²)-(x+根号xy+y)/(x根号x-y根号y).
先化简再求值(x-y/1-x+y/1)÷x平方+2xy+y平方/2y,其中x=根号3+根号2,y=根号3-根号2 写的详
化简求值:根号x^-2xy+y^2 + x^2 -6xy+9y^2/x-3y,其中x=根号3,y=根号5
①{(x+y)/(根号x+根号y)}+{2xy/根号xy(根号x+根号y)}
先化简再求值:xy^3÷(-xy)+(x+2y)(x-2y),其中x=根号2,y=1
(x+2根号xy+y)÷(根号x+根号y)
计算 (xy-y2分之x根号x+x根号y)-(x根号x-y根号y分之x+根号xy+y)