问题
解答题
计算: (1)
(2)
(3)(2
|
答案
(1)原式=
+27 7
-107 7
=-55 7
;7
(2)原式=4
-2 3 2
+2 2
=7 2
;2
(3)原式=(2
)2-43
+(3
)2-43
=12-4
+3-43
=11-4
.3
计算: (1)
(2)
(3)(2
|
(1)原式=
+27 7
-107 7
=-55 7
;7
(2)原式=4
-2 3 2
+2 2
=7 2
;2
(3)原式=(2
)2-43
+(3
)2-43
=12-4
+3-43
=11-4
.3