问题:
(1)解方程:x 2-4x-4=0;
(2)计算:( 2
24
-
18
)÷
3
+ 2
3
2
.
(1)解方程:x 2-4x-4=0;
(2)计算:( 2
-
)÷
+ 2
.
(2)计算:( 2
24 |
18 |
3 |
|
参考答案: