已知m²+m-1=0求代数式m²+2m²+2006的值

已知m²+m-1=0求代数式m²+2m²+2006的值

题目错了吧 怎么有2个平方而没有合并啊?应该是m³+2m²+2006

m³+2m²+2006
=m(m²+m-1)+m²+m+2006
=m*0+(m²+m-1)+2007
=0+0+2007
=2007.