问题
计算题
分解因式 (1)a2(x﹣y)+16(y﹣x);
(2)(x2+y2)2﹣4x2y2.
答案
解:(1)a2(x﹣y)+16(y﹣x),
=(x﹣y)(a2﹣16),
=(x﹣y)(a+4)(a﹣4);
(2)(x2+y2)2﹣4x2y2,
=(x2+2xy+y2)(x2﹣2xy+y2),
=(x+y)2(x﹣y)2.
分解因式 (1)a2(x﹣y)+16(y﹣x);
(2)(x2+y2)2﹣4x2y2.
解:(1)a2(x﹣y)+16(y﹣x),
=(x﹣y)(a2﹣16),
=(x﹣y)(a+4)(a﹣4);
(2)(x2+y2)2﹣4x2y2,
=(x2+2xy+y2)(x2﹣2xy+y2),
=(x+y)2(x﹣y)2.