已知m方+m-1=0,求m的3次方+2m的2次方-2009的值

急啊
2024-12-12 00:17:04
推荐回答(2个)
回答1:

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

回答2:

-2008