问题 解答题

因式分

(1)x3-x;

(2)3ax2-6axy+3ay2

答案

(1)x3-x,

=x(x2-1),

=x(x-1)(x+1);

(2)3ax2-6axy+3ay2

=3a(x2-2xy+y2),

=3a(x-y)2

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