已知m^2+m-1=0,求m^3+2m^2+2004急急急!

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已知m^2+m-1=0,求m^3+2m^2+2004急急急!已知m^2+m-1=0,求m^3+2m^2+2004急急急!已知m^2+m-1=0,求m^3+2m^2+2004急急急!m^2+m-1=0则

已知m^2+m-1=0,求m^3+2m^2+2004急急急!
已知m^2+m-1=0,求m^3+2m^2+2004
急急急!

已知m^2+m-1=0,求m^3+2m^2+2004急急急!
m^2+m-1=0
则m^2+m=1
m^3+2m^2-2004
=m^3+m^2+m^2+2004
=m(m^2+m)+m^2+2004
=m^2+m+2004
=1+2004
=2005

(m+0.5)^2=1.25
m=-1/2-根号5/2 或 m=-1/2+根号5/2
再代入可得所求答案为2005
死做的,看你急嘛

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已知m^2+m-1=0,求m^3+2m^2+2004急 急 急!