问题
解答题
把下列各式分解因式:
(1)a2(x-y)2+2a(x-y)3+(x-y)4
(2)(x2+y2)2-4x2y2.
答案
(1)a2(x-y)2+2a(x-y)3+(x-y)4,
=(x-y)2[a2+2a(x-y)+(x-y)2,
=(x-y)2(a+x-y)2;
(2)(x2+y2)2-4x2y2,
=(x2+2xy+y2)(x2-2xy+y2),
=(x+y)2(x-y)2.
把下列各式分解因式:
(1)a2(x-y)2+2a(x-y)3+(x-y)4
(2)(x2+y2)2-4x2y2.
(1)a2(x-y)2+2a(x-y)3+(x-y)4,
=(x-y)2[a2+2a(x-y)+(x-y)2,
=(x-y)2(a+x-y)2;
(2)(x2+y2)2-4x2y2,
=(x2+2xy+y2)(x2-2xy+y2),
=(x+y)2(x-y)2.