(x+y)分之(x^2+2xy+y^2)乘 （x^2+y^2)除 (y-1)分之(x^4-y^4)
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(x+y)分之(x^2+2xy+y^2)乘（x^2+y^2)除(y-1)分之(x^4-y^4)(x+y)分之(x^2+2xy+y^2)乘（x^2+y^2)除(y-1)分之(x^4-y^4)(x+y)分
(x+y)分之(x^2+2xy+y^2)乘 （x^2+y^2)除 (y-1)分之(x^4-y^4)
(x+y)分之(x^2+2xy+y^2)乘 （x^2+y^2)除 (y-1)分之(x^4-y^4)
(x+y)分之(x^2+2xy+y^2)乘 （x^2+y^2)除 (y-1)分之(x^4-y^4)
原式=(x+y)/(x+y)^2*(x^4-y^4)(x^2+y^2)/(y-1)
=[2*(x^2+y^2)(y-1)(x+y)]/[(x+y)^2(y^2+x^2)(x+y)(x-y)]
=2*(y-1)/(x+y)^2(x-y)
根号x-根号y分之x+y-x根号y-y根号x分之2xy
(xy-x^2)除以xy分之x-y
y平方-2y+1分之xy-x-y-1
xy分之x^2-y^2除以(x-y)
已知X+Y分之XY等于3,求-X+3XY-Y分之2X-3XY+2Y
已知x+y分之xy=2,那么3x-5xy+3y分之3xy-x-y=
若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少?
若x+y分之xy=2,则-x+3xy-y分之3x-xy+3y=多少?
已知X+Y分之XY=2,求-X+3XY-Y分之3X+5XY+3Y
x^2-y^2分之x+x^2-2xy+y^2分之y 化简
通分 2X+2Y分之X-Y与(X+Y)²分之XY
(-3分之1xy)的平方×[xy(2x-y)-2x(xy-y的平方)]
已知x+y=2,xy=-5则x分之y+y分之x等于
(x-y)分之(y的平方)-(y-x)分之(x的平方-2xy)
x-y分之x² - y-x分之y²-2xy
（xy-x²）除以xy分之x²-2xy+y²乘以x²分之x-y
(x-y)分之x-(x+y)分之y+(x的2次方-y的2次方)分之2xy
(xy^2-2xy+x)*y^3-y分之y^3+y^2