题目内容
因式分
(1)a3-4a;
(2)x3-2x2y+xy2.
(1)a3-4a;
(2)x3-2x2y+xy2.
(1)a3-4a,
=a(a2-4),
=a(a+2)(a-2);
(2)x3-2x2y+xy2,
=x(x2-2xy+y2),
=x(x-y)2.
=a(a2-4),
=a(a+2)(a-2);
(2)x3-2x2y+xy2,
=x(x2-2xy+y2),
=x(x-y)2.
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