问题
计算题
分解因式:
(1)a3b﹣ab3;
(2)x2﹣2xy+y2﹣z2.
答案
解:(1)a3b﹣ab3
=ab(a2﹣b2)
=ab(a+b)(a﹣b) ;
(2)x2﹣2xy+y2﹣z2
=(x﹣y)2﹣z2
=(x﹣y+z)(x﹣y﹣z).
分解因式:
(1)a3b﹣ab3;
(2)x2﹣2xy+y2﹣z2.
解:(1)a3b﹣ab3
=ab(a2﹣b2)
=ab(a+b)(a﹣b) ;
(2)x2﹣2xy+y2﹣z2
=(x﹣y)2﹣z2
=(x﹣y+z)(x﹣y﹣z).