问题
解答题
计算: (1)2
(2)
(3)
(4)
|
答案
(1)原式=-4
;7
(2)原式=5
+42
=92
;2
(3)原式=2
+23
=43
.3
(4)原式=
-22x
=-2x
.2x
计算: (1)2
(2)
(3)
(4)
|
(1)原式=-4
;7
(2)原式=5
+42
=92
;2
(3)原式=2
+23
=43
.3
(4)原式=
-22x
=-2x
.2x