因式分解 1)1-8xy^2+16x^2y^4 2)0.01x^2-0.2xy+y^2 3)9a^4+6a^2+1

题目

因式分解 1)1-8xy^2+16x^2y^4 2)0.01x^2-0.2xy+y^2 3)9a^4+6a^2+1

答案

1-8xy^2+16x^2y^4
=（4xy^2-1）^2
0.01x^2-0.2xy+y^2
=(0.1x-y)^2
9a^4+6a^2+1
=(3a^2+1)^2