问题 解答题

因式分

(1)a3-4a;

(2)x3-2x2y+xy2

答案

(1)a3-4a,

=a(a2-4),

=a(a+2)(a-2);

(2)x3-2x2y+xy2

=x(x2-2xy+y2),

=x(x-y)2

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