(-a)^2(2-3ab) ,(x+2y)(2x-y)只要计算.

(1)2（a^2-ab)-2a^2+3ab (2)5(2x-7y)-3(4x-10y) (3)(x+y)-[3x+(-x+y)] a^2b(x-y)-ab(y-x) [(x+2y)^2-(-x-2y)(-x+2y)+2y(x-2y)]/2y计算-2a^2b-a^3-ab^2分解因式 （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 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 计算:(-a)^2(2-3ab) (x+2y)(2x-y) (-a)^2(2-3ab) ,(x+2y)(2x-y)只要计算. 5a^2b(x-y)^3乘[-2ab(x-y)^2]^3= 因式分解：5a^2b（x-y）^2-10ab^2（y-x）^3 5a^2 b(x-y)^3-30ab^2(y-x)^2 5a^2b(x-y)^3-30ab^2(y-x)^2 ab^2(x-y)^2+a^2b(y-x)^3因式分解 合并同类项:(1)x-y+5x-4y (2)2/3a-1/2ab+3/4a+ab-b (3合并同类项:(1)x-y+5x-4y(2)2/3a-1/2ab+3/4a+ab-b(3)4(x-y)+2(x-y)-7(x-y)-3(x-y) 3a²b(2x-y)-6ab²(y-2x)怎么因式分解? 3a平方b(2x-y)-6ab平方(y-2x) -x^(a+1)*y^3与1/2y^(b)x^2是同类项求ab (x+2)(x-2)-4y(x-y)3ab(x^2+1)+x(a^2+b^2) 因式分解 [3(x+y)²a²][-2(x+y)ab³]