已知m²+m-1=0,求m³+2m²-2013的值
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已知m²+m-1=0,求m³+2m²-2013的值
已知m²+m-1=0,求m³+2m²-2013的值
已知m²+m-1=0,求m³+2m²-2013的值
已知m²+m-1=0,
那么,m^2+m=1
m(m+1)=1
m+1=1/m
即: m³+2m²-2013
=m(m^2+2m)-2013
=m(m+1)^2-m-2013
=m/m^2-m-2013
=1/m-m-2013
=m+1-m-2013
=-2012