问题
解答题
分解因式:
(1)4x2y-xy3
(2)(xy-1)(xy-3)+1.
答案
(1)4x2y-xy3=xy(4x-y2);
(2)(xy-1)(xy-3)+1,
=(xy)2-4xy+3+1,
=(xy)2-4xy+4,
=(xy-2)2.
分解因式:
(1)4x2y-xy3
(2)(xy-1)(xy-3)+1.
(1)4x2y-xy3=xy(4x-y2);
(2)(xy-1)(xy-3)+1,
=(xy)2-4xy+3+1,
=(xy)2-4xy+4,
=(xy-2)2.