y/(x+y)-x/(x-y)=?怎么算?
来源：学生作业帮助网 编辑：六六作业网 时间：2025/01/01 07:16:46
y/(x+y)-x/(x-y)=?怎么算?y/(x+y)-x/(x-y)=?怎么算?y/(x+y)-x/(x-y)=?怎么算?y/(x+y)-x/(x-y)=y(x-y)/(x²-y
y/(x+y)-x/(x-y)=?怎么算?
y/(x+y)-x/(x-y)=?怎么算?
y/(x+y)-x/(x-y)=?怎么算?
y/(x+y)-x/(x-y)
=y(x-y)/(x²-y²)-x(x+y)/(x²-y²)
=[y(x-y)-x(x+y)]/(x²-y²)
=(xy-y²-x²-xy)/(x²-y²)
=-(x²+y²)/(x²-y²)
通分后：
分母：(x+y)(x-y)=x^2-y^2
分子：y(x-y)-x(x+y)=xy-y^2-x^2-xy=-(x^2+y^2)
∴原式=-(x^2+y^2)/x^2-y^2
x+x+x+y+y=6.4 y+y+y+x+x=7.1 怎么算?
y/(x+y)-x/(x-y)=?怎么算?
4x方y/(x-2y)(x+2y)怎么算[x方/x-2y]-4x方y/(x-2y)(x+2y)=?
(y-x)(x-y)^3(y-x)^5怎么算
推倒公式:(x+y)(x*x-3x+y*y)=x*x*x+y*y*y怎么做.
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
化简 x / y(x+y) - y / x(x+y) =
|x-y+2|=|x+y+2|怎么算?
38+X-Y=52+Y-X怎么算
x-y+2y的平方/x+y怎么算?
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空
(x-y)^4·(x-y)-2(y-x)³·（y-x)²怎么算,
（x-y)².(x-y)³.（y-x)².（y-x）³ 怎么算,
(7x+y)(7x-y)-(-x+y)(x-y) 用乘法公式计算 怎么算?
计算(x+y)乘x平方/x平方-y平方+y平方/y-x怎么算
（x+y+z)(-x+y+z)(x-y+z)(x+y-z)怎么算
[(2X+Y)*(2X+Y)-Y(Y+4X)]/2X 怎么算?
y=x^x+x^(x^x) 求y的导数怎么算啊