A:was award
B:was awarded
C:had been award
D:had been awarded
计算:(x4)2+(x2)4﹣x(x2)2•x3﹣(﹣x)3•(﹣x2)2•(﹣x)
已知m是方程x2-x-1=0的一个根,则代数式m2-m的值为( )