因式分解：-x3-4xy2+4x2y

因式分解：-x3-4xy2+4x2y 因式分解：x3-y3-x2y+xy2 因式分解:x3-2x2y+xy2 4xy2-4x2y-y3因式分解 x3-4xy2-2x2y+8y因式分解 正确的秒批 x3+2x2y+2xy2+y3因式分解 3x2y+xy2-[2xy2-4x2y+(x2y-2xy2)] (4xy2-2x2y)-( )=x3-2x2y+4xy2+y3． x.y取何值时,代数(x3y+3x2y-5xy2+6y3)+(y3+2xy2+x2y-2x3)-(4x2y-x3-3xy2+7y3).y取何值时，代数（x3y+3x2y-5xy2+6y3）+（y3+2xy2+x2y-2x3）-（4x2y-x3-3xy2+7y3）的值都是常数? 5xy2-【3xy2-(4xy2-2x2y)】+2x2y】+2x2y-xy2 化简,再求值 试说明代数式(x3+3x2y-4xy2+6y3)-(2x3-x2y-xy2-y3-1)+(x34x2y+3xy2-7y3)的值与xy取值无关 因式分解：-x3+4x2-4xy2 x3-2x2y+xy2-x x3+x2y-xy2-y3= 试说明:无论x,y取何值时,代数式(x3+3x2y-5+6y3)+(y3+2xy2+x2y-2x3)-(4x2y-x3-3xy2+7y2)的值是常数.要具体过程,注意格式 因式分解4xy2-4x2y-y3 得多少?其中2和3都是指数 分解公因式,4xy2-4x2y-y3, (X3-2x2y+xy2)÷（x3-xy2）要求约分