1-x²+2xy-y²x²-y²+x-y麻烦用因式分解解

计算x²-x/x²×x/1-x和x²-4y²/x²+2xy+y²÷x+2y/x²+xy x²-2xy+y²-9 X²+xy²-x²-y²-3xy+2x+2y-1分解因式 若x²+xy-2y²=0,则x²+3xy+y²/x²+y² x²+xy-2y²=0则x²+3xy+y²/x²+y² 1 3x²+4xy-y²=2 4xy+1-4x²-y²= 因式分解 x²-2xy+y²-z² (-½x²y)^3*(-3xy²）²(-1/2x²y）³×（-3xy²）² 1-x²+2xy-y²x²-y²+x-y麻烦用因式分解解 76三1 合并多式项：5 ² x²y-5xy²- xy - -------- +x²y2 2 计算：4xy²-3x²y-{3x²y-[2xy²-4x²y+2(x²y-2xy²)]急 x²-4y²/x²+2xy+y²÷x+2y/2x²+2xy 1.(8xy-x²+y²)-(x²-y²+8xy)2.(2x²-1/2+3x)-4(x-x²+1/2)3.3x²-[7x-(4x-3)-2x²] 已知xy=8满足x²y-xy²-x+y=56,求x²+y²x-3=y-2=z-1,求x²+y²+z²-xy-yz-zx因式分解 如图 (5x²y-2xy²-3xy)-(2xy+5x²y-2xy²),x=-1/5,y=-1/3 x²y²-x²y-xy²+x+y-1因式分解 已知|x+2|+(y+1²=0,求x²+(2xy-3y²)-2(x²+xy-2y²)的值 求助：x²+y²/ x²+2xy+y²+2/xy÷（1/x+1/y）²化简