问题 解答题

因式分

(1)x3-x

(2)(x2+y22-4x2y2

答案

(1)x3-x,

=x(x2-1),

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

(2)(x2+y22-4x2y2

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

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

单项选择题
单项选择题