问题
计算题
将下列各式分解因式:
(1)3x﹣12x3
(2)(x2+y2)2﹣4x2y2.
答案
解:(1)3x﹣12x3,
=3x(1﹣4x2),
=3x(1+2x)(1﹣2x);
(2)(x2+y2)2﹣4x2y2,
=(x2+y2+2xy)(x2+y2﹣2xy),
=(x+y)2(x﹣y)2.
将下列各式分解因式:
(1)3x﹣12x3
(2)(x2+y2)2﹣4x2y2.
解:(1)3x﹣12x3,
=3x(1﹣4x2),
=3x(1+2x)(1﹣2x);
(2)(x2+y2)2﹣4x2y2,
=(x2+y2+2xy)(x2+y2﹣2xy),
=(x+y)2(x﹣y)2.