填空题. | a |=1,| b |=2,| c |=3, 且a > b >c,则 =( ).

问题描述:

填空题. | a |=1,| b |=2,| c |=3, 且a > b >c,则 =( ).
| a |=1,| b |=2,| c |=3, 且a > b >c,则(a+b-c)的平方=( ).

a=1或-1,b=-2,c=-3