设m^2+m=1,则m^3+2m^2+2007=?
2个回答
m^3+2m^2+2007 =m(m^2+m)+m^2+2007 =m*1+m^2+2007 =m+m^2+2007 =1+2007 =2008 所以m^3+2m^2+2007=2008
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