x y a-1 6--- ----- --------- --------6ab² 9a²bc a² +2a+1 a²-16ab² 分之x ｜ 9a²bc分之y ｜ a² +2a+1分之a-1 ｜ a²-1分之6

1.计算(a^2+a+1)(a^2-a+1) 2.计算(x-y)(x+y)+(3x-2y)(2x+y)-x(6x-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 (1)x^2*x^8+x^13/x^3 (2)a^19/a^12/a^3 (3) (x-2y)^5/(2y-x)^3 (4)(x-y)^5/(x-y) (5)(x-y)^6/(y-x)^4 1、(-y^3)^5/y^3/ y^2+2(-y)^102、(x-y)^7/(y-x)^6+(x+y)^3/(x+y)^23、已知X^a=5,x^b=3,求X^(3a-2b)的值 (a-3)x- y+6- 5y- 1 1,(x+y)²-(x+y),2,（x-y）²-（x-y）³2,（x-y）²-（y-x）³ 用分解公因式算(1).2(x-y)-3(y-x)²（2）.4ad(a+b)²-6a²b(a+b)(3).(x+y)²(x-y)+（x+y)(x-y)²(4).2a(a-3)²-6a²(3-a)+8a(a-3)(5)2 分式计算：x^2-4/x^2+6x+9÷x+2/x+3 a/(a-2)-4a/a^2-4 1/(x-y)-1/(x+y)*x^2-2xy+y^2/(y+1)^2-(y-1)^2x^2-4/x^2+6x+9÷x+2/x+3a/(a-2)-4a/a^2-41/(x-y)-1/(x+y)*x^2-2xy+y^2/(y+1)^2-(y-1)^2 把(x-y),(a+b)作为一个因式,合并同类项:3(x-y)-9(x-y)-8(x-y）＋6（x－y）－1 2x/x+y+2y/x+y a/a+b+b/a-b 1/3x²+2/4y-5/6xy解出来快 集合A={(x,y)|x-2y=1}B={(x,y)|x+3y=6},则A∩B= A∪B=? 设A={(x,y)}|3x+2y|.设A={(x,y)}|3x+2y|.B={(x,y)|x-y=2|},C={(x,y)|2x-2y|=3},D={(x,y)|6x+4y=2|},求A∩B,B∩C,A∩D设A={(x,y)|3x+2y=1}.B={(x,y)|x-y=2},C={(x,y)|2x-2y=3},D={(x,y)|6x+4y=2},求A∩B，B∩C，A∩D 已知x+y=a,2x-y=-2a,求[（x/y-y/x)/(x+y)-x(1/x-1/y)]/[(x+1)/y]的值 1） (x+y)^2-(x+y)^3 2） （x-y）^2-（x-y）^3 3)(x-y)^2-(y-x)^3 因式分解因式分解 1） (x+y)^2-(x+y)^3 2） （x-y）^2-（x-y）^3 3) (x-y)^2-(y-x)^3 4) 2(x-y)-3(y-x)^25) 4ab(a+b)^2-6a^2b(a+b) 6) (x+y)^2(x-y)+(x+y)(x-y)^2 7) 2a(a-3)^2-6a^ A={(x,y)|3x+2y+1},B={(x,y)|6x+4y=2},求A∩B第一个集合A改为{(x,y)|3x+2y=1} 3p(x+1)^3 y^2+6p(x+1)y+3p(x+1)因式分解(x+y)^4(x-y)-(x+y)(y-x)^4因式分解(a-b)^n+2-(a-b)^2 因式分解(a-b)^2-6(b-a)+9.25(x-y)^2+10(y-x)+1 因式分解(a-b)^2-6(b-a)+9.25(x+y)^2+10(y-x)+1 (1)(x+y)^2-(x+y)^3(2)(x-y)-(x-y)^3(3)(x-y)^2-(y-x)^3(4)2(x-y)-3(y-x)^2(5)4ab(a=b)^2-6a^2b(a+b)(6)(x+y)^2(x-y)+(x+y)(x-y)^2(7)2a(a-3)^2-6a^2(3-a)+8a(a-3)(8)24xy^2z^2(x+y-z)-32xyz(z-x-y)^2+8xy(z-x-y)(9)(a-b)(b-a)^n(b-a)^2n-1 [两解）（10）2^2=3,2^b