若m^2+m-1=0,求m^3+2m^2+2011的值(要有过程) 急急急急急急急急

2025-01-20 01:49:57
推荐回答(2个)
回答1:

原式=(m^3+m^2-m)+(m^2+m-1)+1012
=1012

回答2:

m^3+2m^2+2011
=m(m^2+m-1)+m^2+m+2011
=0+m^2+m-1+2012
=0+2012
=2012