问题
解答题
(1)
(2)(2
|
答案
(1)原式=2
-3
-3 2
=
-3
;2
(2)原式=(2
)2-(2
)2+(37
)2-302
+252
=8-7+18-30
+252
=44-30
.2
(1)
(2)(2
|
(1)原式=2
-3
-3 2
=
-3
;2
(2)原式=(2
)2-(2
)2+(37
)2-302
+252
=8-7+18-30
+252
=44-30
.2