(要过程)计算:2X²-5X+X²+4X-3X²-2

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(要过程)计算:2X²-5X+X²+4X-3X²-2(要过程)计算:2X²-5X+X²+4X-3X²-2(要过程)计算:2X²-5

(要过程)计算:2X²-5X+X²+4X-3X²-2
(要过程)计算:2X²-5X+X²+4X-3X²-2

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