3a的3次方-12a的平方+12a
问题描述:
3a的3次方-12a的平方+12a
答
3a(3a-2)^2-12a^2
答
3a^3-12a^2+12a
=3a(a^2-4a+4)
=3a(a-2)^2
答
=3a(a^2-4a+4)
=3a(a-2)^2
答
(a-2)(3a-6)