作业帮(x-y+(4xy/x-y))(x+y-(4xy/x+y)) 分式计算
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(x-y+(4xy/x-y))(x+y-(4xy/x+y)) 分式计算
(x-y+(4xy/x-y))(x+y-(4xy/x+y)) 分式计算
(x-y+(4xy/x-y))(x+y-(4xy/x+y)) 分式计算
(x-y+(4xy/x-y))(x+y-(4xy/x+y))
=【(x-y）^2+4xy】/（x-y)*【(x+y）^2-4xy】/（x+y)
=【(x+y）^2/（x-y)】【(x-y）^2】/（x+y) 】
=(x+y）（x-y)
=x^2-y^2.
先通分，第一个括号=（x2-2xy+y2+4xy)/(x-y)
第二个括号=（x2+2xy+y2-4xy)/(x+y)
合并同类项之后=[（x2+2xy+y2)/(x-y)][(x2-2xy+y2)/(x+y）]=[(x+y)2/(x-y)][(x-y)2/(x+y)]
然后约分 =（x+y)(x-y)=x2-y2.
运用A方减b方的公式去套，
得出 (x-y)平方-（（4xy平方/x平方-y平方））
|x|/x+y/|y|+xy/|xy|=
计算下面式子{x-y+[(4xy)/(x-y)]}{x-y-[(4xy)/(x-y)]}
（x-y+4xy/x-y）(x+y-4xy/x-y)
(x-y+4xy/x+y)(x+y-4xy/x+y)等于的多少? 谢谢!
化简计算:[x-y+4xy/(x-y)] * [x+y-4xy/(x+y)]
计算:[x-y+4xy/(x-y)] * [x+y-4xy/(x+y)]
化简[x-y+4xy/(x-y)][x+y-4xy/(x-y)]
计算：（x-y+4xy/x-y)(x+y-4xy/x+y)
(x一y+4xy/x-y)(x+y-4xy/x+y)
化简:(x+y-4xy/x+y)*(x-y-4xy/x-y)=
(x-y+(4xy/x-y))(x+y-(4xy/x+y)) 分式计算
因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y)
xy(x-y)-x(x-y)²
计算:2xy/(x+y)².(x+y)/4y
(x+y)(x+y+2xy)+(xy+1)(xy-1)(x+y)(x-y)+4(y-1)
-x-3xy+y
xy-1+x-y
集合{(x,y)|xy