题目内容
(1)
=
;(2)
=
;(3)
=
则括号中分别应该填入(1)______;(2)______;(3)______.
| b |
| a |
| ab |
| a() |
| ||
| a+b |
| () |
| 2a+2b |
| 3a+3b |
| 9c |
| a+b |
| () |
则括号中分别应该填入(1)______;(2)______;(3)______.
(1)
=
;
(2)
=
;
(3)
=
.
故答案为a、a2+2b2、3c.
| b |
| a |
| ab |
| a(a) |
(2)
| ||
| a+b |
| a2+2b2 |
| 2a+2b |
(3)
| 3a+3b |
| 9c |
| a+b |
| (3c) |
故答案为a、a2+2b2、3c.
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