题目内容
化简
(1)
•
;
(2)(
)2•
-
÷
.
(1)
| a2-4a+4 |
| a2-2a+1 |
| a-1 |
| a2-4 |
(2)(
| 2a |
| b |
| 1 |
| a-b |
| a |
| b |
| b |
| 4 |
(1)原式=
•
=
;
(2)原式=
•
-
•
=
(
-1)
=
•
=
.
故答案为
、
.
| (a-2)2 |
| (a-1)2 |
| a-1 |
| (a+2)(a-2) |
=
| a-2 |
| (a-1)(a+2) |
(2)原式=
| 4a2 |
| b2 |
| 1 |
| a-b |
| a |
| b |
| 4 |
| b |
=
| 4a |
| b2 |
| a |
| a-b |
=
| 4a |
| b2 |
| a-a+b |
| a-b |
=
| 4a |
| b(a-b) |
故答案为
| a-2 |
| (a-1)(a+2) |
| 4a |
| b(a-b) |
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