问题 解答题

将下列各式分解因式:

(1)3x-12x3

(2)(x2+y22-4x2y2

答案

(1)3x-12x3

=3x(1-4x2),

=3x(1+2x)(1-2x);

(2)(x2+y22-4x2y2

=(x2+y2+2xy)(x2+y2-2xy),

=(x+y)2(x-y)2

选择题
单项选择题