4a(x-y)-2b(y-x)

(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y) 因式分解：a(x-y)^2+b(y-x)^3 4(x-y)^2+8(y-x)(x+y)1.a(x-y)^2+b(y-x)^3 2.4(x-y)^2+8(y-x)(x+y) 通分 a/(y-x)^2,b/(x-y)(x+y) 因式分解a(x-y)+b(y-x)+(2x-y) 因式分解:4a(x-y)-2b(x-y) 4a(x-y)-2b(y-x) 4a(x-y)-2b(y-x) a(x-y)(x+y)-b(y-x)(x+y)-c(x-y)^2(y+x)提取公因式 4a[x-y]的平方-2b【Y--X】的平方+[y-X]求过程 4a(x-y)二次方-2b(y-x)二次方+(y-x)= (x+y)(a-2b) 计算下面的题(过程)(a-b)(-a-b)(x-y)(y+x)^2(x-y+z)^2(x^2+y^2)(x^4+y^4) (2a-b)(4a²+b²)(b+a) (2x-y)²-4(x-y)(x+2y) （2a+b)（2a-3b）+3a（2a+b)和x（x+y)(x-y)-x(x+y)²4a（x+y)-6x-6y和啊a（a-b）-ab+b² [1]a(x-2y)-b(2y-x)+d(2x-4y) [2]x平方-2xy+y平方-2x+2y+1 【3】一（a-x)(a-y）-x(y-a)(X-a)[1]a(x-2y)-b(2y-x)+d(2x-4y) [2]x平方-2xy+y平方-2x+2y+1【3】一（a-x)(a-y）-x(y-a)(X-a) 分解因式,急求! 如果A={（x,y）|x,y+2>0},B={（x,y）|2x+3y-6>0},C={（x,y）|x-4 (-x+y)(y²+x²)再乘以( )就等于x`4-y`4 A.X-Y B.X+Y C.-X+Y D.-X-YA.X-Y B.X+Y C.-X+Y D.-X-Y`表示次方 几道 数学题急啊 对了再加20分(x+y)^2-(x+y)^3(x-y)^2-(x-y)^3 (x-y)^2-(y-x)^32(x-y)-3(y-x)^24ab(a+b)^2-6a^2b(a+b)(x+y)(x-y)-(x+y)^28a(x-y)^2-4b(y-x)a=-5 a+b+c=-5.2求代数式a^2(-b-c)-3.2a(c+b)的值