因式分解:ab(c2-d2)-(a2-b2)cd.
问题描述:
因式分解:ab(c2-d2)-(a2-b2)cd.
答
ab(c2-d2)-(a2-b2)cd
=abc2-abd2-a2cd+b2cd
=ac(bc-ad)+bd(bc-ad)
=(ac+bd)(bc-ad).