2017-12-31
展开全部
2x(3²-4x+1)-3x²(2x-3)-1
=18x-8x²+2x-6x³+9x²-1
=-6x³+x²+18x-1
=-6×(-5)³+(-5)²+18×(-5)-1
=750+25-90-1
=684
=18x-8x²+2x-6x³+9x²-1
=-6x³+x²+18x-1
=-6×(-5)³+(-5)²+18×(-5)-1
=750+25-90-1
=684
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询