{[(x根号x)+(x根号y)]/(xy-y2)}-[x+(根号xy)+y]/[(x根号x)-(y根号y)] y2是指y
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{[(x根号x)+(x根号y)]/(xy-y2)}-[x+(根号xy)+y]/[(x根号x)-(y根号y)] y2是指y的平方;求上述式子的值.
{[(x根号x)+(x根号y)]/(xy-y2)}-[x+(根号xy)+y]/[(x根号x)-(y根号y)] 化简或计算。
{[(x根号x)+(x根号y)]/(xy-y2)}-[x+(根号xy)+y]/[(x根号x)-(y根号y)] 化简或计算。
{[(x根号x)+(x根号y)]/(xy-y2)
=[x(根号x+根号y)]/[y(x-y)]
=x/[y(根号x-根号y)]
[x+(根号xy)+y]/[(x根号x)-(y根号y)]
=[x+(根号xy)+y]/[(根号x-根号y)(x+根号xy+y)]
=1/(根号x-根号y)
{[(x根号x)+(x根号y)]/(xy-y2)}-[x+(根号xy)+y]/[(x根号x)-(y根号y)]
=x/[y(根号x-根号y)]-1/(根号x-根号y)
=(x-y)/[y(根号x-根号y)]
=(根号x+根号y)/y
=[x(根号x+根号y)]/[y(x-y)]
=x/[y(根号x-根号y)]
[x+(根号xy)+y]/[(x根号x)-(y根号y)]
=[x+(根号xy)+y]/[(根号x-根号y)(x+根号xy+y)]
=1/(根号x-根号y)
{[(x根号x)+(x根号y)]/(xy-y2)}-[x+(根号xy)+y]/[(x根号x)-(y根号y)]
=x/[y(根号x-根号y)]-1/(根号x-根号y)
=(x-y)/[y(根号x-根号y)]
=(根号x+根号y)/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)
x根号x+x根号y/xy-y^2)-(x+根号xy+y/x根号x-y根号)y
化简:((根号x-根号y)^3+2x根号x+y根号y)/(x根号x+y根号y)+(3根号xy-3y)/(x-y)
{(x-y)/(根号x+根号y)}-(x+y-2倍根号xy)/(根号x-根号y)=?
化简:(x-y)除以(根号x+根号y)-(x-2根号xy+y)除以(根号x-根号y)
【(x-y)^3(x^1/2+y^1/2)^-3+3(x根号y-y根号x)】/(x根号x+y根号y)+(2xy根号xy-
①{(x+y)/(根号x+根号y)}+{2xy/根号xy(根号x+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).
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 x+根号xy+y分之x根号x-y根号y
已知y=根号(x-8)+根号(8-x)+18,求代数式[(x+y)/(根号x+根号y)]-2xy/(x根号y-y根号x)
{化简} [x+y/(根号x+根号y)]+[2xy/x·根号y+y·根号x]