问题
解答题
化简: (1)
(2)(
(3)
(4)(
|
答案
(1)原式=4
-2 1 4
+202
=2 95 4
;2
(2)原式=
-218
-345 2
=3
-62
-35 2
=-6
;5
(3)原式=
+45
-42 2 2 2
=
+42 2 2
=
+41 2
=
;9 2
(4)原式=(
)2+22
+(12
)2-[(6
)2-(7
)2]4
=2+4
+6-33
=5+4
.3