6a^2b-9ab^2+3ab a^3-6a^2-7a (x^2+x)^2-(x+1)^2
{3x^2(a^2+b^2)-3a^2b^2+3[x^2+(a+b)x+ab]*[x(x-a)-b(x-a)]}/2x^
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
分式约分a-b/a^2+ab乘a^2b^2-a^4/ab-a^2.x^2-3x/x^2-6x+9乘x^2-11x+30/
因式分解 x^2-5x-6 y^2-x-12 (a+b)^3-(a+b) 6a^2b^2-18ab^2c+12ab^2c
(3a+b)(3a-b) (-1/2a-b) (3y+2x)^2 (3ab+2b)^2 -8a^4b^/6ab^2 (3
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
定义新运算“+”如下:a+b=ab-a+b,则(x-1)+(2x+3)
9ab ²+6abc/3ab 9a²+6ab+b²/3a+b x²-36/2x+
1.ab(x^2+1)+x(a^2+b^2)
几道数学题,化简.3a^b-[2ab-2(a^2b+2ab^2)]x(-6x-9)-x(-8x-15)+2X(3-X)7
分式的:(1)a²-ab除ab-b² (2)x²-6x+9除以x²-9 (3)x
因式分解-6a^3+4ab^3-2a^2b,3a^2(x-y)+27(y-x)