题目内容
分解因式:
(1)a(x-y)-b(y-x);
(2)a2+4ab+4b2.
(1)a(x-y)-b(y-x);
(2)a2+4ab+4b2.
(1)a(x-y)-b(y-x),
=a(x-y)+b(x-y),
=(x-y)(a+b);
(2)a2+4ab+4b2=(a+2b)2.
=a(x-y)+b(x-y),
=(x-y)(a+b);
(2)a2+4ab+4b2=(a+2b)2.
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