已知m²-m-3=0,求m³+999m²-1003m-991的值请快,超过9点失效!……= =哪个对的哦?

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/27 07:25:57
已知m²-m-3=0,求m³+999m²-1003m-991的值请快,超过9点失效!……= =哪个对的哦?
x){}KsՔ -usum tml XZk[ZZ su-- jyڰOyvM;.lj⣆e@d`t';V=]~{$SBl/X*bkB* 6Tn&>uƹd\RZH#Ya``Z$A!{ 4cz{CTsQϧl|6w۞o=md'v=DPe@E FΙ`Q"E`8tux1v @fY)PBl

已知m²-m-3=0,求m³+999m²-1003m-991的值请快,超过9点失效!……= =哪个对的哦?
已知m²-m-3=0,求m³+999m²-1003m-991的值请快,超过9点失效!
……= =哪个对的哦?

已知m²-m-3=0,求m³+999m²-1003m-991的值请快,超过9点失效!……= =哪个对的哦?
m²-m-3=0
m²-m=3
m³+999m²-1003m-991
=m³-m²+1000m²-1003m-991
=m(m²-m)+1000m²-1003m-991
=3m+1000m²-1003m-991
=1003m²-1003m-991
=1003*(m²-m)-991
=1003*3-991
=3009-991
=2018

m³+999m²-1003m-991
=(m³-m²-3m)+1000m²-1000m-991
=m(m²-m-3)+1000(m²-m-3)+2009
=2009

由条件式得:m²=m+3代人原式得:
m×m²+999m²-1003m-991
=m﹙m+3﹚+999﹙m+3﹚-1003m-991
=m²+3m+999m+999×3-1003m-991
=m+3+3m+999m+999×3-1003m-991
=3+999×3-991
=2009