1...3a^2(x-y)-27(x-y)b^22...-4a^3 b^4+16a^2 b^5-16ab^63...a^2-(b^2+c^2-2bc)4...(x+2)(x+4)+x^2-45.9m^2-6m+2n-n^2
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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)
36a^3(x-y)^2/27a(y-x)
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)
(2x+y)(2x-3y)+x(2y+y) 2a(x-y)-4b(x-y)
(3a^3/X+Y)^3*(X^2-Y^2)除以(Y-X/Y+X)^2
1.-2(b-2a)^2+(b-2a)2.-3(x-y)^2-(y-x)^33.3(x+y)(y-x)-(x-y)^3
5a(x-y)^2+10a(y-x)^3
1.(x+2)^2-(x+y)^32.(x-y)^2-(x-y)^33.(x-y)^2-(y-x)^3
计算 1.[(a+b)^2-(a+b)(a-b)]÷(-b) 2.[(x+y)(2x+y)+(x+y)(x-y)]÷3x
通分 a/(y-x)^2,b/(x-y)(x+y)
因式分解a(x-y)+b(y-x)+(2x-y)
因式分解:3a(x-y)-(x-y)
3a(x-y)-(y-x) 因式分解
a^2(x-y)+(y-x)因式分解
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
1.x^4+3x²y²+4y^4 2.x^4+4 3.x²-2x-a²+2a 4.(x+y)²-4x-4y+41.x^4+3x²y²+4y^4 2.x^4+4 3.x²-2x-a²+2a 4.(x+y)²-4x-4y+4 5.x(x-2)-a(a-2) 6.(x+y)²-4(x+y-1)
x(x-y)2-(y-x)3
因式分解:(x+y)^3(x-y)-(x+y)(x-y)^3,9x^2-16(a+b)^2