作业帮(x+y)^2/y^2-xy÷[-y^2+xy/(x-y)^2,x=0,y=根号10
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(x+y)^2/y^2-xy÷[-y^2+xy/(x-y)^2,x=0,y=根号10
(x+y)^2/y^2-xy÷[-y^2+xy/(x-y)^2,x=0,y=根号10
(x+y)^2/y^2-xy÷[-y^2+xy/(x-y)^2,x=0,y=根号10
原式=(x+y)²/y(x-y)×(x-y)²/y(x+y)
=(x+y)(x-y)/y²
=(x²-y²)/y²
=（0-10）/10
=-1
(x^2-xy)y÷y-x/xy怎么做?
计算（xy-y^2)÷x-y/xy
化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y)
(-x-y)(x^2+xy+y^2)
化简x^-y^/x^-2xy+y^
2*(x-y)²(y-x)(xy)
谁帮我化简：[(x+y)(x-y)-(x+y)^2-2y(x-y)-2xy]÷xy
(x+y)^2/y^2-xy÷[-y^2+xy/(x-y)^2,x=0,y=根号10
（x-y/x+y）^2÷（y-x/x^2+2xy+y^2)^2
计算：(x+y/x-y)÷(xy+x^2)
X-Y/2X+2Y XY/X+Y²
因式分解：x×x-xy-2y×y-x-y
(3xy)^2÷(-xy)+(x-2y)^2-(x+2y)(x-2y)
x^2y-2xy+y化简
X^Y-2XY^2+y^3
计算:4xy-(x+y)^2/xy(x+y)(x-y)÷x^2+xy-2y^2/x^2y+2xy^2
x-y/xy-y^2计算
因式分解：x方y+2xy+y