问题
解答题
(1)计算:
(2)化简:
|
答案
(1)原式=2
+2-3
+3
-1 2
=1 2
+2;3
(2)原式=
÷(a-2 (a+1)(a-1)
-1 a-1
)a-1 a-1
=
÷(-a-2 (a+1)(a-1)
)a-2 a-1
=
•(-a-2 (a+1)(a-1)
)a-1 a-2
=-
.1 a+1
(1)计算:
(2)化简:
|
(1)原式=2
+2-3
+3
-1 2
=1 2
+2;3
(2)原式=
÷(a-2 (a+1)(a-1)
-1 a-1
)a-1 a-1
=
÷(-a-2 (a+1)(a-1)
)a-2 a-1
=
•(-a-2 (a+1)(a-1)
)a-1 a-2
=-
.1 a+1