问题
解答题
分解因式:
(1)x3y-9xy3
(2)4a2+8a+4.
答案
(1)x3y-9xy3
=xy(x2-9y2)
=xy(x+y)(x-y);
(2)4a2+8a+4
=4(a2+2a+1)
=4(a+1)2.
分解因式:
(1)x3y-9xy3
(2)4a2+8a+4.
(1)x3y-9xy3
=xy(x2-9y2)
=xy(x+y)(x-y);
(2)4a2+8a+4
=4(a2+2a+1)
=4(a+1)2.