问题 解答题

分解因式:

(1)2a3b-8ab3

(2)-xy+2x2y-x3y.

答案

(1)2a3b-8ab3

=2ab(a2-4b2

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

(2)-xy+2x2y-x3y

=-xy(1-2x+x2

=-xy(x-1)2

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