问题
解答题
因式分
(1)ax2-ay2;
(2)(x-y)2+4xy.
答案
(1)ax2-ay2,
=a(x2-y2),
=a(x+y)(x-y);
(2)(x-y)2+4xy
=x2-2xy+y2+4xy,
=x2+2xy+y2,
=(x+y)2.
因式分
(1)ax2-ay2;
(2)(x-y)2+4xy.
(1)ax2-ay2,
=a(x2-y2),
=a(x+y)(x-y);
(2)(x-y)2+4xy
=x2-2xy+y2+4xy,
=x2+2xy+y2,
=(x+y)2.