m^2+m-1=0则m^3+2m^2+3=
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 12:09:49
![m^2+m-1=0则m^3+2m^2+3=](/uploads/image/z/13029897-57-7.jpg?t=m%5E2%2Bm-1%3D0%E5%88%99m%5E3%2B2m%5E2%2B3%3D)
m^2+m-1=0则m^3+2m^2+3=
m^2+m-1=0则m^3+2m^2+3=
m^2+m-1=0则m^3+2m^2+3=
∵m^2+m-1=0
∴m^2+m=1
则m^3+2m^2+3=m^3+m^2+m^2+3
=m(m^2+m)+m^2+3
=m+m^2+3
=1+3
=4
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来源:学生作业帮助网 编辑:作业帮 时间:2024/07/06 12:09:49
m^2+m-1=0则m^3+2m^2+3=
m^2+m-1=0则m^3+2m^2+3=
m^2+m-1=0则m^3+2m^2+3=
∵m^2+m-1=0
∴m^2+m=1
则m^3+2m^2+3=m^3+m^2+m^2+3
=m(m^2+m)+m^2+3
=m+m^2+3
=1+3
=4