(要过程)计算:2X²-5X+X²+4X-3X²-2
问题描述:
(要过程)计算:2X²-5X+X²+4X-3X²-2
答
2X²-5X+X²+4X-3X²-2
=﹙2+1-3﹚x²+﹙-5+4﹚x-2
=-x-2