设m²+m=1 求m³+2m²+2005的值_数学解答

设m²+m=1 求m³+2m²+2005的值

人气：257 ℃　时间：2020-02-04 03:01:59

解答

解
m²+m=1
m³+2m²+2005
=m³+m²+m²+2005
=m(m²+1)+m²+2005
=m×1+m²+2005
=m²+m+2005
=1+2005
=2006