问题
解答题
化简下列各式: (1)(
|
答案
(1)原式=
•(x+1)-(x-1) (x-1)(x+1)
,1-x 2
=-
•2 (x-1)(x+1)
,x-1 2
=-
;1 x+1
(2)原式=
+
(2
-3
) 2 3-2
,(
+1)23 3-1
=
-2+2+6
,3
=
+6
.3
化简下列各式: (1)(
|
(1)原式=
•(x+1)-(x-1) (x-1)(x+1)
,1-x 2
=-
•2 (x-1)(x+1)
,x-1 2
=-
;1 x+1
(2)原式=
+
(2
-3
) 2 3-2
,(
+1)23 3-1
=
-2+2+6
,3
=
+6
.3