-
-
的结果是( )
-
D .
-
﹣2
=6
B . 5
+5
=10
C . 4
÷2
=2
D . 4
×2
=8
=(结果保留根号)
﹣
=3(a≥0)
D .
•
=
(a≥0,b≥0)
D . x5﹣x2=x3
-
-
;
B .
C .
D .
.
)2﹣|1﹣
|+
+
-15
的结果是.
B .
C .
D .
B .
C .
D .
﹣
=3
B .
×
=
C .
+
=
D .
÷
=4
B .
C .
D .
B .
C .
D .
÷2=
B . 2
+3
=5
C . 6×
=1
D .
B .
C .
D .