问题 填空题

分解因式:x4-8y2(x2-2y2)=______.

答案

x4-8y2(x2-2y2),

=x4-8x2y2+16y4

=(x2-4y22

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

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

单项选择题
单项选择题