计算:③x²+y²+2xy分之x²-4y²÷x²+xy分之2y+x ④
计算:③x²+y²+2xy分之x²-4y²÷x²+xy分之2y+x ④
x²+y²+2xy分之x²-4y² ÷x²+xy分之2y+x
(x²+2xy+y²分之x²-4y²)÷(x²+xy分之x+2y)
计算:2x+2y分之3y + x²+xy分之2xy
计算:(xy-x²)乘 x-y分之xy
计算:1、(xy分之x²-y²)×(x-y分之x)-(y分之x);
计算xy-y²分之x²+2xy+y²÷x²-2xy+y²分之xy+y&
化简x-y分之x + x³-2x²y+xy²分之y³ ÷ y²-x
(xy-x²)除以xy分之x²-2xy+y²乘以x²分之x-y
计算:(xy-x²)×x-y/xy
计算:x-y分之x - x+y分之y + x²-y²分之2xy 计算:a-1分之2a+2 除以 (a
2x+2y分之3y 加 x²+xy分之2xy