作业帮y厂x+x厂y/xy-y2-x+厂xy+y/x厂x-y厂y 化简
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y厂x+x厂y/xy-y2-x+厂xy+y/x厂x-y厂y 化简
y厂x+x厂y/xy-y2-x+厂xy+y/x厂x-y厂y 化简
y厂x+x厂y/xy-y2-x+厂xy+y/x厂x-y厂y 化简
=√(xy)(√x+√y)/y(x-y)-(x+√(xy)+y)/(√x-√y)(x+√(xy)+y)
=√x/√y(√x-√y)-1/(√x-√y)
=(√x-√y)/√y(√x-√y)
=1/√y
=√y/y
y厂x+x厂y/xy-y2-x+厂xy+y/x厂x-y厂y 化简
(x-y)(x2+xy+y2)
(x+y)(x2-xy+y2)
(x-y)(x2+xy+y2)-xy(y-x)
因式分解x2+y2-xy-x-y+1
x2-4y2-3xy+y+x
|x|/x+y/|y|+xy/|xy|=
因式分解x^3y-2x^2y2+xy^3
1*{x+y+xy=7{x2+y2+xy=132*{x2+y2=10{x+xy+y=7
x2+y2 xy+x+y-1x y属于R 比较大小 x2+y2 xy+x+y-1
已知x.y满足X2-y2=2xy.则x-y/x+y=?x.
计算(x+y/x-y + 4xy/y2-x2)(x2-9y2)/（x2+2xy-3y2）
【x(xy-xy)-y(x-xy)】÷3xy
已知x2-y2=xy（xy不等于0）则x/y-y/x=____
求分解因式 (x+y)(x2-xy+y2)-xy(x+y)
若x-y/x+y=2,则x2+2xy+y2/4xy=多少
-x-3xy+y
xy-1+x-y