因式分解:①4x2y2-12x2y;②(x2+4)2-16x2;③3a3-6a2+3a;④x4-y4

因式分解:①4x2y2-12x2y;②(x2+4)2-16x2;③3a3-6a2+3a;④x4-y4.
2024-11-22 17:48:17
推荐回答(1个)
回答(1):

①4x2y2-12x2y=4x2y(y-3);

②(x2+4)2-16x2
=(x2+4)2-(4x)2
=(x2+4+4x)(x2+4-4x),
=(x+2)2(x-2)2

③3a3-6a2+3a,
=3a(a2-2a+1),
=3a(a-1)2

④x4-y4
=(x2+y2)(x2-y2),
=(x2+y2)(x+y)(x-y).