因式分解: (1)2a3b2(a-2b)2-4a2b3(2b-a)2; (2)m3-6m2+9m.
问题描述:
因式分解:
(1)2a3b2(a-2b)2-4a2b3(2b-a)2;
(2)m3-6m2+9m.
答
(1)2a3b2(a-2b)2-4a2b3(2b-a)2
=2a2b2(a-2b)2(a-2b)
=2a2b2(a-2b)3;
(2)m3-6m2+9m
=m(m2-6m+9)
=m(m-3)2.