若xy>0,化简x√-x²分之y
若xy>0,化简x√-x²分之y
(√xy -xy分之x+√xy)除以√xy -y分之x-y(x>0,y.0)
已知2X-3√xy-2y=0(x>0)求2x²+xy-9y²分之x²+4xy-16y
化简x-y分之x + x³-2x²y+xy²分之y³ ÷ y²-x
计算:(xy-x²)乘 x-y分之xy
已知:x²+y²-4x-2y+5=0,求x+√xy分之(√x-√y)²+4√xy的值.
计算:1、(xy分之x²-y²)×(x-y分之x)-(y分之x);
(xy分之x²-y²)-(xy-x²分之xy-y²)
xy分之x²-y分之x算出来多少
(xy-x²)·x²分之x-y
解方程x²分之x²-xy÷(y分之x-x分之y)
(xy-x²)除以xy分之x²-2xy+y²乘以x²分之x-y