分解因式:(1)-4a^2+4a-1 (2)-4x^2y+12xy^2-9y^3(3)9(x-y)^2-6(y-x)+1 (4)3-6x+3x^2(5)-a+2a^2-a^3(6)(x^2+y^2)^2-4x^2y^2

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分解因式:(1)-4a^2+4a-1 (2)-4x^2y+12xy^2-9y^3(3)9(x-y)^2-6(y-x)+1 (4)3-6x+3x^2(5)-a+2a^2-a^3(6)(x^2+y^2)^2-4x^2y^2
分解因式:(1)-4a^2+4a-1 (2)-4x^2y+12xy^2-9y^3
(3)9(x-y)^2-6(y-x)+1 (4)3-6x+3x^2(5)-a+2a^2-a^3(6)(x^2+y^2)^2-4x^2y^2

分解因式:(1)-4a^2+4a-1 (2)-4x^2y+12xy^2-9y^3(3)9(x-y)^2-6(y-x)+1 (4)3-6x+3x^2(5)-a+2a^2-a^3(6)(x^2+y^2)^2-4x^2y^2