问题
解答题
(1)计算
(2)化简
|
答案
(1)原式=2
-5×10
+10 10 10
=5 2
;10
(2)原式=
•x(x+2) (x+1)(x-1) x-1 x
=
,x+2 x+1
将x=
-1代入得:原式=3
=
+13 3
.3+ 3 3
(1)计算
(2)化简
|
(1)原式=2
-5×10
+10 10 10
=5 2
;10
(2)原式=
•x(x+2) (x+1)(x-1) x-1 x
=
,x+2 x+1
将x=
-1代入得:原式=3
=
+13 3
.3+ 3 3