问题
解答题
(1)计算:
(2)先化简再求值:(1-
|
答案
(1)原式=3
-2×2
+4+2 2
-12
=3
+3;2
(2)原式=
•x-1 x
=x (x-1)2
,1 x-1
当x=-2时,原式=
=-1 -2-1
.1 3
(1)计算:
(2)先化简再求值:(1-
|
(1)原式=3
-2×2
+4+2 2
-12
=3
+3;2
(2)原式=
•x-1 x
=x (x-1)2
,1 x-1
当x=-2时,原式=
=-1 -2-1
.1 3