已知m²+m-1=0,求m³+2m²+2007旳值
问题描述：
已知m²+m-1=0,求m³+2m²+2007旳值
答
∵m²+m-1=0∴m²+m=1∴m³+2m²+2007=m³+m²-m+m²+m+2007=m(m²+m-1)+(m²+m-1)+2008=0+0+2008=2008【中学生数理化】团队为您答题,请点击下面的【选为满意回答】按钮....