(x-2y)²+4x-8y+4 因式分解a³-a²-a+1 因式分解

因式分解2x(x-y)^4 - x²(x-y)² + xy(y-x)²RT 已知(x+y)²;=8,(x-y)²;=4,求x²+y² 计算x²-x/x²×x/1-x和x²-4y²/x²+2xy+y²÷x+2y/x²+xy 1.(x+y)²-4xy=( )²2.x²-（ ）+25y²=（ )²3.x²-8x²y²+16y四次方=（ ）²4.7.2²-2.8²= . x²-4y² x+2y---------- ÷ --------分数线x²+2xy+y² x²+xyx²-4y² x+2y----------÷--------分数线x²+2xy+y² x²+xy(x+2y)(x-2y)x(x+y)=----------------(x+y)(x+y)(x+2y)(x-y)x=------(x+y)这样对了吗? 2x-y=2,求[(x²+y²)-(x-y)²+2y(x-y)]÷4y x²-4y²+x-2y因式分解 x²-4y²+x+2y因式分解 (x²-4y²)-(x+2y)怎样因式分解? 4x²-y²+2x-y 因式分解 x²-4y²-x-2y 分解因式 x²-x-4y²+2y x²-4y²/x²+2xy+y²÷x+2y/2x²+2xy (x+2y)²+4x-8y+4因式分解 分解因式：2x²-8xy+5y²6x²-9x-4242x²-85xy+42y²3x²-5xy-y²(2x-y+3)(2x-y+1)-15(x+y)²+4(x+y)(3x-y)+4(3x-y)²完全按照原题打的 如果2x-y=8,求代数式[(x²+y²)-(x-y)²=2y(x-y)]/(4y)的值 1.(8xy-x²+y²)-(x²-y²+8xy)2.(2x²-1/2+3x)-4(x-x²+1/2)3.3x²-[7x-(4x-3)-2x²] 计算：4xy²-3x²y-{3x²y-[2xy²-4x²y+2(x²y-2xy²)]急