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.
分解因式:
(1)2a3b-8ab3
(2)-xy+2x2y-x3y.
(1)2a3b-8ab3
=2ab(a2-4b2)
=2ab(a+2b)(a-2b);
(2)-xy+2x2y-x3y
=-xy(1-2x+x2)
=-xy(x-1)2.