问题
解答题
计算: (1)4
(2)
(3)(5+
(4)(
|
答案
(1)原式=2
-52 2
=-3
;2
(2)原式=
-(3
-3
)2
=
-3
+3
=2
;2
(3)原式=25
+102
-105
-105 2
=15
;2
(4)原式=(
-215 5
)×15 5
=
-103
=-93
.3
计算: (1)4
(2)
(3)(5+
(4)(
|
(1)原式=2
-52 2
=-3
;2
(2)原式=
-(3
-3
)2
=
-3
+3
=2
;2
(3)原式=25
+102
-105
-105 2
=15
;2
(4)原式=(
-215 5
)×15 5
=
-103
=-93
.3