已知m方+m-1=0,求m的3次方+2m的2次方-2009的值

网友回答

m的3次方+2m的2次方-2009
=m³+m²-m+m²+m-1-2008
=m(m²+m-1)+(m²+m-1)-2008
=0+0-2008
=-2008
======以下答案可供参考======
供参考答案1:
-2008