x(a-x)(a-y)-y(x-a)(y-a)怎么算

因式分解 a²（y-x)+(x-y) (x+y)-(a-b)(x+y)因式分解 a^2(x-y)+(y-x)因式分解 因式分解:3a(x-y)-(x-y) 3a(x-y)-(y-x) 因式分解 设A={(x,y)/x+y 因式分解 a(y-x)-b(x-y) (5)a(x+y)-b(x+y)-x-y因式分解 通分:-x/a(x-y) ,y/b(y-x) 通分x/a(x-y),y/b(y-x) 通分 a/(y-x)^2,b/(x-y)(x+y) 因式分解a(x-y)+b(y-x)+(2x-y) a(x+y)的平方-2a(x+y )+a a(x+y)^2+4a-4a(x+y) a(x-y)(x+y)-b(y-x)(x+y)-c(x-y)^2(y+x)提取公因式 已知x+y=a,2x-y=-2a,求[（x/y-y/x)/(x+y)-x(1/x-1/y)]/[(x+1)/y]的值 A.(x+y)(x-y) B.(x-y)(-x-y) C.(-x+y)(x+y) D.(x+y)(-x-y)可以用完全平方公式计算的是? x(a-x)(a-y)-y(x-a)(y-a)怎么因式分解