因式分解–要化成最簡式

因式分解
(1)x^4 – 2(a^2+b^2)x^2 + (a^2-b^2)^2
(2)(a^2-b^2)x^2 + 4abx – (a^2-b^2)
(3)ax^3 – (a-b)x^2 + (a-b)x – a
(4)x^4 – 2x^3 – 2x^2 + 10x – 15
(5)acx^2 +(bc-ad)x -bd
(6)2xy^2 +xy -3x -y^2 +2y -1
(7)x^2 -xy -2y^2 -3y -1
(8)5a^3b -30ab^3 -5a^2b^2
(9)380 -(a+b)(a+b+1)
(10)2(x^2 +2x +1)^2 – (x^2+2x) -7
(11)(x+1)(x+2)(x+3)(x+6)-15x^2
(12)(x^2 -x -6)(x^2 +3x -4)+24
(13)(xy-1)(x-1)(y+1)-xy

 

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