分解因式,要过程
(1)(m+n)(n-m)-n(m+n)(m+n)(2)-27x^2(3x-y)^2-9y(y-3x)(3)3(a-b)^4-(b-a)^3(4)x(x-y)^2+xy(...
(1)(m+n)(n-m)-n(m+n)(m+n)
(2)-27x^2(3x-y)^2-9y(y-3x)
(3)3(a-b)^4-(b-a)^3
(4)x(x-y)^2+xy(x-y)
(5)a(a+b-c)-b(c-a-b)-c(b-c+a)
(6)x^3y^2(x-2y)^3-x^2y^4(2y-x)^2
(7)(x-2)+(1-x)(2-x) 展开
(2)-27x^2(3x-y)^2-9y(y-3x)
(3)3(a-b)^4-(b-a)^3
(4)x(x-y)^2+xy(x-y)
(5)a(a+b-c)-b(c-a-b)-c(b-c+a)
(6)x^3y^2(x-2y)^3-x^2y^4(2y-x)^2
(7)(x-2)+(1-x)(2-x) 展开
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