问题:
(1)
3
3+
3
+
12
-(
3
+1)2+
3
4
+(-3)2÷(
1
2
)-1
(2)解方程:x 2-3x-4=0.
(1)
+
-(
+1)2+
+(-3)2÷(
)-1
(2)解方程:x 2-3x-4=0.
|
||
3+
|
12 |
3 |
|
1 |
2 |
(2)解方程:x 2-3x-4=0.
参考答案: