因式分解 1/3-3a^2

问题描述:

因式分解 1/3-3a^2

1/3-3a^2
=1/3(1-9a^2)
=1/3(1+3a)(1-3a)

1/3-3a^2
= 3(1/9-a^2)
= 3(1/3+a)(1/3-a)

1/3-3a^2
=1/3(1-9a²)
=1/3(1+3a)(1-3a)