已知m的平方+m-1=0,则m的3次方+2m的平方+2004=?

2025-06-22 12:26:20
推荐回答(3个)
回答1:

m²+m-1=0
m²+m=1

m³+2m²+2004
=m³+m²+m²+2004
=m(m²+m)+m²+2004
=m+m²+2004
=1+2004
=2005

回答2:

m³+2m²+2004
=m(m²+m)+m²+2004
∵m²+m-1=0
∴m(m²+m)+m²+2004
=m+m²+2004
=1+2004
=2005

回答3:

m²+m-1=0
所以m²+m=1
所以原式=m³+m²+m²+2004
=m(m²+m)+m²+2004
=m+m²+2004
=1+2004
=2005