问题
解答题
在有理数范围内分解因式:
(1)3ax2+6axy+3ay2;
(2)(x2+y2)2-4x2y2.
答案
(1)3ax2+6axy+3ay2,
=3a(x2+2xy+y2),
=3a(x+y)2;
(2)(x2+y2)2-4x2y2,
=(x2+y2+2xy)(x2+y2-2xy),
=(x+y)2(x-y)2.
在有理数范围内分解因式:
(1)3ax2+6axy+3ay2;
(2)(x2+y2)2-4x2y2.
(1)3ax2+6axy+3ay2,
=3a(x2+2xy+y2),
=3a(x+y)2;
(2)(x2+y2)2-4x2y2,
=(x2+y2+2xy)(x2+y2-2xy),
=(x+y)2(x-y)2.