问题
解答题
计算: (1)(
(2)
|
答案
(1)原式=1-
+51 8
=6-1 8
=
;47 8
(2)原式=
×x-2 (x+1)(x-1)
+(x+1)2 2(x+1) 1 x-1
=
+x-2 2(x-1) 1 x-1
=x-2+2 2(x-1)
=
.x 2(x-1)
计算: (1)(
(2)
|
(1)原式=1-
+51 8
=6-1 8
=
;47 8
(2)原式=
×x-2 (x+1)(x-1)
+(x+1)2 2(x+1) 1 x-1
=
+x-2 2(x-1) 1 x-1
=x-2+2 2(x-1)
=
.x 2(x-1)