题目内容
在有理数范围内分解因式:?
(1)3ax2+6axy+3ay2;
(2)(x2+y2)2-4x2y2.
(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.
=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.
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