解:设原多项式为K 由题意知:K+x²+6x-6=2x²-2x+3可知K=x²-8x+9∴正确答案为K-(x²+6x-6)=x²-8x+9-x²-6x+6=-14x+15满意请采纳,好好学习!!!
解:设原多项式为K 由题意知:K+x²+6x-6=2x²-2x+3可知K=x²-8x+9∴正确答案为K-(x²+6x-6)=x²-8x+9-x²-6x+6=-14x+15