已知m^2+m-1=0,求m^2+2m^2+2007的值

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/23 08:54:39

m^2+m-1=0
m^2+m=1
m^3+2m^2+2007
=m(m^2+m)+m^2+2007
=m+m^2+2007
=1+2007
=2008
再问：我是求m^2+2m^2+2007,不是m^3+2m^2+2007
再答：题目一定是m^3+2m^2+2007
否则m^2就合并了
再问：可能我抄错题目了，谢谢你的回答！

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