12ab^2(y-x)+9b^3(x-y)+4a^2b(x-y)

(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y) 几道因式分解..4ab(a+b)^2-6a^2b(a+b)(x+y)^2(x-y)+(x+y)(x-y)^22a(a-3 因式分解 1)9x^4-25y^6 2)4x^2+(x+y)^2+4x(x+y) 3)(a+2b)^2-4ab-13b^ x²（x+y)(y-x)-xy(x+y)(x-y) 已知a+b=4,ab=-2,求多项式3a²b+3 ①[(x+y)^2-(x+y)(x-y)]/2y②（-1/3a^3b^2)^2(-2ab^2)^3/(1/9a^4b^4 计算：(2a-5b)(2a^2-3ab+b^2) （3x+2y)(2x+3y)-(x-3y)(3x+4y) 因式分解 (1)6(x-y)^3-3y(y-x)^2 (2)x(x-y)(a-b)-y(y-x)( （-1/3a^2b^2)^2(-2ab^2)^3÷(1/9a^4b^4)^3 [(x+y)^2-(x+y)(x+y)]÷ 3a-3b/10ab*25a^b3/a^-b^= x^-4y^/x^+2xy+y^/x+2y/2x^+2xy 计算:(-2a^2b)(2/3ab^3)(-6b^2c^3) (x+y)(x-y)-(x-2y)(x+2y) (3x-2 分解因式1.2a(x-y)-3b(y-x)2.-x^y-2xy+35y3.a^(x-y)-4b^(x-y)若|a+2|+ 分解公因式的题 x（a-x）(a-y)-y(x-a)(y-a)-ab(a-b)^2+a(b-a)^2a^3b-ab2ab