3a(x+y)-2b(x+y)这道题怎样作?

3a(x+y)-2b(x+y)这道题怎样作? (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) a(x-3)(y-2)+b(3-x)(2-y) 因式分解：2a(x-y)-3b(y-x) 分解因式 3a(x+y)-2b(x+y) 16（a-b)^2-9(a+b)^2和3(x-y)^3+12(y-x)这两道题怎样因式分解 因式分解：(x+y)^3(x-y)-(x+y)(x-y)^3,9x^2-16(a+b)^2 a(x-y)(x+y)-b(y-x)(x+y)-c(x-y)^2(y+x)提取公因式 下列等式的右边是怎样从左边得到的?(1)2x(x-7)^7/4y(y-x)^6=x(x-y)/2y;(2)3/a+b=9(a+b)/3(a+b)². （x+y)²+2（y-x） 因式分解 怎么弄 我这还有几道题（x+y)²-(x+y)(x-z)+(x+y)(y+z)X(X-a)(x-b)-y(a-x)(b-x)x(x+y)(x-y)-x(x+y)²（2a+b)(2a-3b)-3b(2a+b)(a+b)²-9(a-b)²(a²+b²)²-a²b²9（x-y）-y& 因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)(因式分解(1)6(x-y)^3-3y(y-x)^2(2)x(x-y)(a-b)-y(y-x)(b-a)(3)(a+b)(a+b-1)-a-b+1 a/x-y,b/3y-3x,c/x^2-2xy+y^2通分 x+y=a,x-y=b.求2x-3y等于 A={(x,y)|y=-x^2+mx-1},B={(x,y)|y=3-x,0A={(x,y)|y=-x^2+mx-1},B={(x,y)|y=3-x,0 初一因式分解练习题,谁好心帮我解下表示平方1.2X~-3XY-X2.(X+Y)~(X+Y)(X-Y)(X+Y)(Y+Z)3.3X(a+2b)~-6XY(a+2b)4.a(x-y)-b(X-Y)-C(Y-X)5.(b-a)~-2a+2b6.(x-y)~-m(y-x)+y-x7.x(x-y)(a-b)-y(y-x)(b-a)8.已知a+b=13,ab=40,求 b+ab~的值