问题:
(1)先化简,再求值:
x-2
x2-1
÷
2x+2
x2+2x+1
+
1
x-1
,其中x=
2
+1.
(2)解方程:x 2-3x-1=0.
(1)先化简,再求值:
÷
+
,其中x=
+1.
(2)解方程:x 2-3x-1=0.
x-2 |
x2-1 |
2x+2 |
x2+2x+1 |
1 |
x-1 |
2 |
(2)解方程:x 2-3x-1=0.
参考答案: