设m^2+m-1=0,则-m^3-2m^2+1=___
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设m^2+m-1=0,则-m^3-2m^2+1=___设m^2+m-1=0,则-m^3-2m^2+1=___设m^2+m-1=0,则-m^3-2m^2+1=___因为：m^2+m-1=0,所以m^2+
设m^2+m-1=0,则-m^3-2m^2+1=___
设m^2+m-1=0,则-m^3-2m^2+1=___
设m^2+m-1=0,则-m^3-2m^2+1=___
因为：m^2+m-1=0,所以m^2+m=1
-m^3-2m^2+1
=-m(m^2+2m)+1
=-m(m^2+m+m)+1
=-m(1+m)+1
=-（m^2+m）+1
=-1+1
=0
设m^2+m-1=0,则-m^3-2m^2+1=___
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