分解因式(x2+y2)2-x2y2=_.
问题描述:
分解因式(x2+y2)2-x2y2=______.
答
原式=(x2+y2)2-(xy)2
=(x2+y2+xy)(x2+y2-xy),
故答案为:(x2+y2+xy)(x2+y2-xy).