2x2-12x+18.
问题描述:
2x2-12x+18.
答
2x2-12x+18,
=2(x2-6x+9),
=2(x-3)2.
2x2-12x+18.
2x2-12x+18,
=2(x2-6x+9),
=2(x-3)2.